问题
解答题
解方程 8(x-2)=2(x+7)
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答案
(1)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;
(2)
=x 2
,0.15 0.6
0.6x=0.15×2,
0.6x÷0.6=0.3÷0.6,
x=0.5.
解方程 8(x-2)=2(x+7)
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(1)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;
(2)
=x 2
,0.15 0.6
0.6x=0.15×2,
0.6x÷0.6=0.3÷0.6,
x=0.5.