15=30-3x 15-30=3x -15=3x -15/3=x -5=x
-3x=-15+6 -3x=-9 x=-9/-3 x=3
(3x - 9 =15) +9 = 3x=(24)/3 = x=8 x=8
x=5
3x+12x = 15 15x = 15 x = 1
If: 3x = 15 Then: x = 5
15=30-3x 15-30=3x -15=3x -15/3=x -5=x
-3x=-15+6 -3x=-9 x=-9/-3 x=3
x+5 = 3x+15 x-3x = 15-5 -2x = 10 x = -5
(3x - 9 =15) +9 = 3x=(24)/3 = x=8 x=8
x=5
If: 3x = 45 Then: x = 15
6x - 12 = 3x + 15 3x = 27 x = 9
3x+12x = 15 15x = 15 x = 1
3x+4=-11 3x=-15 x=-5
If you mean: x^2+15-3x then its value is 19 when x equals 4
3x + 8 = -7 Therefore, 3x = -15 x = -5