(4-x)*7=(x-4)*9怎么算啊用方程解
问题描述:
(4-x)*7=(x-4)*9怎么算啊用方程解
答
(4-x)*7=(x-4)*9
展开乘进去:
28-7x=9x-36
7x+9x=36+28
16x=64
x=64/16
x=4
答
(4-x)*7=(x-4)*9
28-7X=9X-36
16X=64
X=4
答
(4-x)*7=(x-4)*9
28-7x=9x-36
-7x-9x=-36-28
-16x=-64
x=-64/-16
x=4