what does x mean
-3=5(x+7)+3x
x means there is an unknown value that you
have to find by solving the equation
-3 = 5(x + 7) + 3x
-3 = 5x + 35 + 3x
-3 = 8x + 35
-3 - 35 = 8x + 35 - 35
-38 = 8x
8x = -38
8x / 8 = -38 / 8
x = -4.75
Be sure to check the answer.
-3 = 5(x + 7) + 3x
-3 = 5(-4.75 + 7) + 3(-4.75)
-3 = 5(2.25) - 14.25
-3 = 11.25 - 14.25
-3 = -3