题目内容
解方程,我没问题!
:
=
:x
χ+20%χ=24
8(x-2)=2(x+7)
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χ+20%χ=24
8(x-2)=2(x+7)
(1)
:
=
:x,
x=
×
,
x×
=
×
,
x=
;
(2)x+20%x=24,
1.2x=24,
1.2x÷1.2=24÷1.2,
x=20;
(3)8(x-2)=2(x+7),
8x-16=2x+14,
8x-16-2x=2x+14-2x,
6x-16+16=14+16,
6x÷6=30÷6,
x=5.
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x=
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(2)x+20%x=24,
1.2x=24,
1.2x÷1.2=24÷1.2,
x=20;
(3)8(x-2)=2(x+7),
8x-16=2x+14,
8x-16-2x=2x+14-2x,
6x-16+16=14+16,
6x÷6=30÷6,
x=5.
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