解方程(1)x-7=10-4(x+0.5) (2)(x-3)/5-(x-4)/3=1

问题描述:

解方程(1)x-7=10-4(x+0.5) (2)(x-3)/5-(x-4)/3=1

(1)x-7=10-4(x+0.5)
x-7=10-4x-2
x+4x=8+7
5x=15
x=3
(2) (x-3)/5-(x-4)/3=1
3(x-3)-5(x-4)=15
3x-9-5x+20=15
-2x=15+9-20
-2x=4
x=-2