Question

5x + 3(x + 4) = 7x +12 + x
+

Answer 1

3x+4-7x=12

We simplify the equation to the form, which is simple to understand
3x+4-7x=12

We move all terms containing x to the left and all other terms to the right.
+3x-7x=+12-4

We simplify left and right side of the equation.
-4x=+8

We divide both sides of the equation by -4 to get x.
x=-2

Answer 2

All real numbers are solutions.

Explanation:

5x + 3(x + 4) = 7x +12 + x

All real numbers are solutions.