问题
解答题
解方程:
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答案
(1)x-65%x=70,
35%x=70,
35%x÷35%=70÷35%,
x=200;
(2)120%x-x=0.8,
20%x=0.8,
20%x÷20%=0.8÷20%,
x=4;
(3)49+40%x=89,
49+40%x-49=89-49,
40%x=40,
40%x÷40%=40÷40%,
x=100.
解方程:
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(1)x-65%x=70,
35%x=70,
35%x÷35%=70÷35%,
x=200;
(2)120%x-x=0.8,
20%x=0.8,
20%x÷20%=0.8÷20%,
x=4;
(3)49+40%x=89,
49+40%x-49=89-49,
40%x=40,
40%x÷40%=40÷40%,
x=100.