7x-2(-4x-20)=115

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Solution for 7x-2(-4x-20)=115 equation:


Simplifying
7x + -2(-4x + -20) = 115

Reorder the terms:
7x + -2(-20 + -4x) = 115
7x + (-20 * -2 + -4x * -2) = 115
7x + (40 + 8x) = 115

Reorder the terms:
40 + 7x + 8x = 115

Combine like terms: 7x + 8x = 15x
40 + 15x = 115

Solving
40 + 15x = 115

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 + 15x = 115 + -40

Combine like terms: 40 + -40 = 0
0 + 15x = 115 + -40
15x = 115 + -40

Combine like terms: 115 + -40 = 75
15x = 75

Divide each side by '15'.
x = 5

Simplifying
x = 5

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