selesaikan soal berikut : 1. 30 - 8y = 12y + 30 2. X - 2(X-3) = 5X 3. -5X - 4X + 10 = 1 4. 3X + 12 =7X -8

1 .30 -8y =12y+30
-8y -12y= 30 -30
-20 y = 0
2 .x- 2(x-3)=5x
X^2 - 3x - 2x + 6 = 5x
X^2 -5x -5x = 6
X^2 - 10 x= 6
3. -5x-4x+10 = 1
-9x=1-10
-9x = 9
X = 9÷9=1
4. 3x+12=7x-8
3x-7x=-8-12
-4x= -20
X = -20÷-4=5