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Simplifying
7x2 + -40 = 135
Reorder the terms:
-40 + 7x2 = 135
Solving
-40 + 7x2 = 135
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '40' to each side of the equation.
-40 + 40 + 7x2 = 135 + 40
Combine like terms: -40 + 40 = 0
0 + 7x2 = 135 + 40
7x2 = 135 + 40
Combine like terms: 135 + 40 = 175
7x2 = 175
Divide each side by '7'.
x2 = 25
Simplifying
x2 = 25
Take the square root of each side:
x = {-5, 5}
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