7(x^2-9)+23=135

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Solution for 7(x^2-9)+23=135 equation: 


Simplifying
7(x2 + -9) + 23 = 135

Reorder the terms:
7(-9 + x2) + 23 = 135
(-9 * 7 + x2 * 7) + 23 = 135
(-63 + 7x2) + 23 = 135

Reorder the terms:
-63 + 23 + 7x2 = 135

Combine like terms: -63 + 23 = -40
-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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