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(word完整版)六年级解方程专项练习200题有答案ok

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0.75+x=3.75, 0.75+x﹣0.75=3.75﹣0.75,

x=3,

x÷=3÷,

x=6;

(28)0.8:

=0.48:x,

0.8x=

×0.48,

0.8x=0.2,

0.8x÷0.8=0.2÷0.8, x= (29)χ﹣χ=,

x=,

x

=

x=3;

(30)42:=χ:

x=42×,

x

=30

x=50;

(31)5x﹣0.4=75%, 5x﹣0.4+0.4=75%+0.4, 5x÷5=1.15÷5, x=0.23

( 32) 6x﹣0.9=4.5, 6x﹣0.9+0.9=4.5+0.9, 6x=5.4, 6x÷6=5.4÷6, x=0.9;

(33)2(x﹣3)=5.8, 2(x﹣3)÷2=5.8÷2 x﹣3=2.9,

x﹣3+3=2.9+3, x=5.9; (34) 1.6x=6.4, 1.6x÷1.6=6.4÷1.6, x=4;

(35) 4x﹣3×9=29, 4x﹣27=29, 4x﹣27+27=29+27, 4x=56, 4x÷4=56÷4, x=14; (36)16+8x=40, 16+8x﹣16=40﹣16, 8x=24, 8x÷8=24÷8, x=3;

(37) x÷1.1=3, x÷1.1×1.1=3×1.1, x=3.3 (38)+2x=, +2x

=

2x=, 2x÷2=÷2, x=;

(39)

×3﹣7x=1.04,

2.16﹣7x=1.04,

2.16﹣7x﹣1.04=1.04﹣1.04, 1.12﹣7x=0,

7x÷7=1.12÷7, x=0.16; (40)x﹣1﹣x=2,

x﹣1=2,

x﹣1+1=2+1,

x=3,

x

=3

x=18; (41)x﹣x=14,

x=14, x

=14

x=18; (42)3x﹣x=,

x=, x

=

, x=; (43)

=

2.4x=72×0.26, 2.4x=18.72,

2.4x÷2.4=18.72÷2.4, x=7.8; (44)1.2:=, x=1.2×5, x=6, x

=6

x=9; (45)

=

:,

x=18×,

x=,

x

=

x=12; (46):=x:0.8,x=×0.8, x

=0.04

x=0.2; (47)x=+1,

x

×=

×,

x=1

(48) 1﹣25%X+25%x=+25%x, 0.25x+0.25﹣0.25=1﹣0.25, 0.25x=0.75, x=3;

=

(49)

0.25x=1.25×1.6,

0.25x÷0.25=1.25×1.6÷0.25, x=8;

×X=

, (50)×X÷=,

x=;

(51) 5:8=x:32, 8x=5×32, 8x÷8=5×32÷8, x=20

(52)2x+3×0.9=24.9, 2x+2.7=24.9,

2x+2.7﹣2.7=24.9﹣2.7, 2x÷2=22.2÷2, x=11.1; (53)5.3x﹣2.9x=,

2.4x=,

2.4x÷2.4=÷2.4,

x=;

(54)×(7﹣2.8x)=1.5, ×(7﹣2.8x)

=1.5

7﹣2.8x=2.1,

7﹣2.8x+2.8x=2.1+2.8x,

7﹣2.1=2.1+2.8x﹣2.1, 4.9÷2.8=2.8x÷2.8, x=1.75; (55)x:0.3=:, x=0.3×,

x=, x=

(56)150%x+66=99 1.5x+66=99 1.5x=33 x=22 (57)x+6﹣0.8x=16 0.2x+6=16 0.2x=10 x=50

(58)

x=14.4

(59)

0.55x=5.5 x=10 (60)3÷(X﹣)=1.3

3

÷(X﹣)×(x﹣)=1.3×(x﹣), 3=1.3x﹣0.78,

3

+0.78=1.3x﹣0.78+0.78,

4.68=1.3x,

4.68÷1.3=1.3x÷1.3, x=3.6;

(61)(X+0.5):2=(X﹣4):, ×(x﹣4)=(x+0.5)×, x﹣

×4=x+×0.5,

x﹣10﹣x=x+

x,

2.25x﹣10+10=0.125+10, 2.25x÷2.25=10.125÷2.25, x=4.5 (62) X÷0.05=3.528,

X÷0.05×0.05=3.528×0.05, X=0.1764;

(63)2X﹣4×6=80, 2X﹣24=80,

2X﹣24+24=80+24, 2X=104, 2X÷2=104÷2, X=52;

(64)4×4.5﹣3X=6.38, 18﹣3X=6.38, 18﹣3X+3X=6.38+3X, 6.38+3X=18,

6.38+3X﹣6.38=18﹣6.38, 3X=11.62, 3X÷3=11.62÷3, X=

(65)4X﹣7.2=10,

4X﹣7.2+7.2=10+7.2, 4X=17.2, 4X÷4=17.2÷4, X=4.3; (66)11.5X+X=20, 12.5X=20,

12.5X÷12.5=20÷12.5, X=1.6;

(67)3.8×12+15X=87.6, 45.6+15X=87.6,

45.6+15X﹣45.6=87.6﹣45.6, 15X=42, 15X÷15=42÷15, X=2.8 (68)6X+5=17,

6x+5﹣5=17﹣5, 6x÷6=12÷6, x=2;

(69)0.6×(2.5+X)=4.2, 0.6×(2.5+X)÷0.6=4.2÷0.6, 2.5+x=7,

2.5+x﹣2.5=7﹣2.5, x=4.5;

(70):=X:

, x=×

x÷=

x=0.6

(71)

(72)

, ,

(73)

, ,

(74)4(+x)=,

+4x=, +4x﹣

=

4x=4, x=1; (75)×0.25+x=, 0.2+x=, 0.2+x﹣0.2=﹣0.2,x=

x= (76)x﹣

x=;

(77)200:6=x:, 6x=200×

6x÷6=480÷6, x=80

(78)4÷X=, 4÷X×X=X,

X=4,

X÷=4÷,

X=10;

(79)8(x﹣2)=2(x+7), 8X﹣16=2X+14, 6X﹣16=14, 6X=30, X=5; (80)

:18%=

X=0.18×6.5,

X=1.17,

X=7.8

﹣2x=,

(81)

﹣2x+2x=+2x,

+2x=,

+2x﹣=﹣,

2x=

2x÷2=÷2, x=

x+x=46,

(82)

x(+)=46,

x=46,

=46÷

x=40;

(83):x=:,

x=×,

x=

x÷=÷, x=; (84)

=

, 1.6x=6.4×2, 1.6x=12.8,

1.6x÷1.6=12.8÷1.6, x=8

(85)5(3x﹣4)﹣2(x﹣1)=5(2x﹣1) 15x﹣20﹣2x+2=10x﹣5, 13x﹣18=10x﹣5,

13x﹣18﹣10x=10x﹣5﹣10x, 3x﹣18=﹣5, 3x﹣18+18=﹣5+18, 3x=13, 3x÷3=13÷3, x=;

(86)

=,

3(6x﹣1)=64, 18x﹣3=64, 18x﹣3+3=64+3, 18x=67, 18x÷18=67÷18,

x=

(87)8(2X﹣7)=5(X+13), 16x﹣56=5x+65,

16x﹣56﹣5x=5x+65﹣5x, 11x﹣56=65, 11x﹣56+56=65+56, 11x=121, 11x÷11=121÷11, x=11,

(88)3(x+4.5)=60, 3(x+4.5)÷3=60÷3, x+4.5=20,

x+4.5﹣4.5=20﹣4.5, x=15.5 (89)1.6x+2.4=7.52,

1.6x+2.4﹣2.4=7.52﹣2.4, 1.6x=5.12,

1.6x÷1.6=5.12÷1.6, x=3.2;

(90)3(x﹣0.8)=6.3, 3x﹣2.4=6.3, 3x﹣2.4+2.4=6.3+2.4, 3x=8.7, 3x÷3=8.7÷3, x=2.9;

(91)28.4﹣5x=5.8, 28.4﹣5x+5x=5.8+5x, 5.8+5x=28.4,

5.8+5x﹣5.8=28.4﹣5.8, 5x=22.6, 5x÷5=22.6÷5, x=4.52 (92)x:=

25x=×3,

25x=, 25x÷25=,

x=;

(word完整版)六年级解方程专项练习200题有答案ok

0.75+x=3.75,0.75+x﹣0.75=3.75﹣0.75,x=3,x÷=3÷,x=6;(28)0.8:=0.48:x,
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