7x-(3x+3)=9

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Solution for 7x-(3x+3)=9 equation:


Simplifying
7x + -1(3x + 3) = 9

Reorder the terms:
7x + -1(3 + 3x) = 9
7x + (3 * -1 + 3x * -1) = 9
7x + (-3 + -3x) = 9

Reorder the terms:
-3 + 7x + -3x = 9

Combine like terms: 7x + -3x = 4x
-3 + 4x = 9

Solving
-3 + 4x = 9

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 4x = 9 + 3

Combine like terms: -3 + 3 = 0
0 + 4x = 9 + 3
4x = 9 + 3

Combine like terms: 9 + 3 = 12
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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