the answer is
Simplifying
x + 3 + x + 4 = x + 7 + 2x + 7
Reorder the terms:
3 + 4 + x + x = x + 7 + 2x + 7
Combine like terms: 3 + 4 = 7
7 + x + x = x + 7 + 2x + 7
Combine like terms: x + x = 2x
7 + 2x = x + 7 + 2x + 7
Reorder the terms:
7 + 2x = 7 + 7 + x + 2x
Combine like terms: 7 + 7 = 14
7 + 2x = 14 + x + 2x
Combine like terms: x + 2x = 3x
7 + 2x = 14 + 3x
Solving
7 + 2x = 14 + 3x
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-3x' to each side of the equation.
7 + 2x + -3x = 14 + 3x + -3x
Combine like terms: 2x + -3x = -1x
7 + -1x = 14 + 3x + -3x
Combine like terms: 3x + -3x = 0
7 + -1x = 14 + 0
7 + -1x = 14
Add '-7' to each side of the equation.
7 + -7 + -1x = 14 + -7
Combine like terms: 7 + -7 = 0
0 + -1x = 14 + -7
-1x = 14 + -7
Combine like terms: 14 + -7 = 7
-1x = 7
Divide each side by '-1'.
x = -7
Simplifying
