方程x-5.3+12=10.
问题描述：
方程x-5.3+12=10.
答
x=10.7-12+5.3
x=4
答
x - 5.3 + 12 = 10.7
x = 10.7 + 5.3 - 12
x = 16 - 12
x = 4