Tentukan solusi dari persamaan linear berikut a. 5x -(x+5)=x+7 b. 4/x=2/x-1

a. 5x-(x+5) = x+7
5x-x-5 = x+7
4x-5 = x+7
4x-x = 7+5
3x = 12
x = 4
b. 4/x = 2/x-1
(dikali silang)
4 (x-1) = 2.x
4x-4 = 2x
4x-2x = 4
2x = 4
x = 2