nilai x yang memenuhi persamaan 3(x-1)+x=-x+4 adalah...

3(x-1) +x = -x + 4
3x-3+x = -x +4
3x+x-3 = -x+4
4x -3 = -x + 4
4x + x = 3 + 4
5x = 7
x = 7/5
= 1.4

3(x-1)+x = -x + 4
3x - 3 + x = -x + 4
4x - 3 = -x + 4
4x + x = 4 + 3
5x = 7
x = 1,4