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Simplifying
(2x2) + -1 = 7
Reorder the terms:
-1 + (2x2) = 7
Solving
-1 + (2x2) = 7
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '1' to each side of the equation.
-1 + 1 + (2x2) = 7 + 1
Combine like terms: -1 + 1 = 0
0 + (2x2) = 7 + 1
(2x2) = 7 + 1
Combine like terms: 7 + 1 = 8
(2x2) = 8
Divide each side by '2'.
x2 = 4
Simplifying
x2 = 4
Take the square root of each side:
x = {-2, 2}
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