问题
解答题
解方程. X-15%X=8.5
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答案
(1)x-15%x=8.5,
0.85x=8.5,
0.85x÷0.85=8.5÷0.85,
x=10;
(2)
-0.5x=12.5%,3 4
-0.5x+0.5x=12.5%+0.5x,3 4
12.5%+0.5x-0.125=
-0.125,3 4
0.5x÷0.5=0.625÷0.5,
x=1.25.
解方程. X-15%X=8.5
|
(1)x-15%x=8.5,
0.85x=8.5,
0.85x÷0.85=8.5÷0.85,
x=10;
(2)
-0.5x=12.5%,3 4
-0.5x+0.5x=12.5%+0.5x,3 4
12.5%+0.5x-0.125=
-0.125,3 4
0.5x÷0.5=0.625÷0.5,
x=1.25.