x+3(x-3)=15

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


Simplifying
x + 3(x + -3) = 15

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

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

Combine like terms: x + 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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