3x-7(9-x)=12

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Solution for 3x-7(9-x)=12 equation:


Simplifying
3x + -7(9 + -1x) = 12
3x + (9 * -7 + -1x * -7) = 12
3x + (-63 + 7x) = 12

Reorder the terms:
-63 + 3x + 7x = 12

Combine like terms: 3x + 7x = 10x
-63 + 10x = 12

Solving
-63 + 10x = 12

Solving for variable 'x'.

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

Add '63' to each side of the equation.
-63 + 63 + 10x = 12 + 63

Combine like terms: -63 + 63 = 0
0 + 10x = 12 + 63
10x = 12 + 63

Combine like terms: 12 + 63 = 75
10x = 75

Divide each side by '10'.
x = 7.5

Simplifying
x = 7.5

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