7x-(3x+9)=15

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Solution for 7x-(3x+9)=15 equation:


Simplifying
7x + -1(3x + 9) = 15

Reorder the terms:
7x + -1(9 + 3x) = 15
7x + (9 * -1 + 3x * -1) = 15
7x + (-9 + -3x) = 15

Reorder the terms:
-9 + 7x + -3x = 15

Combine like terms: 7x + -3x = 4x
-9 + 4x = 15

Solving
-9 + 4x = 15

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 4x = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 4x = 15 + 9
4x = 15 + 9

Combine like terms: 15 + 9 = 24
4x = 24

Divide each side by '4'.
x = 6

Simplifying
x = 6

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