30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
x=4
5x+y=-7 3x+y=15 8=D
5x+25=10 5x+25-25=10-25 5x=-15 5x/5=-15/5 x=-3
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
x=4
x=(-3)
5x+y=-7 3x+y=15 8=D
5x + 3 = -12 5x =-12-3 =-15 x = -3
5x+25=10 5x+25-25=10-25 5x=-15 5x/5=-15/5 x=-3
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
x = -5
x = 27
It is: y = 5x+15
if you meant 5x+9=3*15 then, 5x = 36, x = 7.2 if you meant 5x+9=3x+15 then, 2x = 6, x = 3
5x + 15 = 28xSubtract 5x from each side:15 = 23xDivide each side by 23:15/23 = xThat's about 0.652 (rounded).