3x+5(x-9)=12

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Solution for 3x+5(x-9)=12 equation:


Simplifying
3x + 5(x + -9) = 12

Reorder the terms:
3x + 5(-9 + x) = 12
3x + (-9 * 5 + x * 5) = 12
3x + (-45 + 5x) = 12

Reorder the terms:
-45 + 3x + 5x = 12

Combine like terms: 3x + 5x = 8x
-45 + 8x = 12

Solving
-45 + 8x = 12

Solving for variable 'x'.

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

Add '45' to each side of the equation.
-45 + 45 + 8x = 12 + 45

Combine like terms: -45 + 45 = 0
0 + 8x = 12 + 45
8x = 12 + 45

Combine like terms: 12 + 45 = 57
8x = 57

Divide each side by '8'.
x = 7.125

Simplifying
x = 7.125

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