7x-(5x+7)=9

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Solution for 7x-(5x+7)=9 equation:


Simplifying
7x + -1(5x + 7) = 9

Reorder the terms:
7x + -1(7 + 5x) = 9
7x + (7 * -1 + 5x * -1) = 9
7x + (-7 + -5x) = 9

Reorder the terms:
-7 + 7x + -5x = 9

Combine like terms: 7x + -5x = 2x
-7 + 2x = 9

Solving
-7 + 2x = 9

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + 2x = 9 + 7

Combine like terms: -7 + 7 = 0
0 + 2x = 9 + 7
2x = 9 + 7

Combine like terms: 9 + 7 = 16
2x = 16

Divide each side by '2'.
x = 8

Simplifying
x = 8

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