问题
解答题
解方程:
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答案
(1)(
+5 6
)x=5 8
,7 20
x=35 24
,7 20
x÷35 24
=35 24
÷7 20
,35 24
x=
;6 25
(2)(1-25%)x=36,
75%x=36,
75%x÷75%=36÷75%,
x=48;
(3)30%x=90,
30%x÷30%=90÷30%,
x=300;
(4)x+20%x=40,
120%x=40,
120%x÷120%=40÷120%,
x=3
.1 3