12=x+7y

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Solution for 12=x+7y equation:


Simplifying
12 = x + 7y

Solving
12 = x + 7y

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
12 + -1x = x + -1x + 7y

Combine like terms: x + -1x = 0
12 + -1x = 0 + 7y
12 + -1x = 7y

Add '-12' to each side of the equation.
12 + -12 + -1x = -12 + 7y

Combine like terms: 12 + -12 = 0
0 + -1x = -12 + 7y
-1x = -12 + 7y

Divide each side by '-1'.
x = 12 + -7y

Simplifying
x = 12 + -7y

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