Answer:
x = 33.5
Explanation:
Simplifying
(x + 7) * 2 = 81
Reorder the terms:
(7 + x) * 2 = 81
Reorder the terms for easier multiplication:
2(7 + x) = 81
(7 * 2 + x * 2) = 81
(14 + 2x) = 81
Solving
14 + 2x = 81
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-14' to each side of the equation.
14 + -14 + 2x = 81 + -14
Combine like terms: 14 + -14 = 0
0 + 2x = 81 + -14
2x = 81 + -14
Combine like terms: 81 + -14 = 67
2x = 67
Divide each side by '2'.
x = 33.5
Simplifying
x = 33.5