问题
解答题
解方程: ①X-60%X=18 ②
③40%X+30=80. |
答案
(1)X-60%X=18,
40%x=18,
40%x÷40%=18÷40%,
x=45;
(2)
X+2.5×8=95,3 5
X+20-20=95-20,3 5
x÷3 5
=75÷3 5
,3 5
x=125;
(3)40%X+30=80,
40%X+30-30=80-30,
40%x÷40%=50÷40%,
x=125.