问题
解答题
解方程.
2x-470=160
5.2x+3.8x=6.3
6x÷0.5=1.2.
答案
(1)2x-470=160,
2x-470+470=160+470,
2x=630,
2x÷2=630÷2,
x=315;
(2)5.2x+3.8x=6.3,
(5.2+3.8)x=6.3,
9x=6.3,
x=0.7;
(3)6x÷0.5=1.2,
6x÷0.5×0.5=1.2×0.5,
6x=0.6,
x=0.1.