3(x-9)-y=2x-7

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Solution for 3(x-9)-y=2x-7 equation:


Simplifying
3(x + -9) + -1y = 2x + -7

Reorder the terms:
3(-9 + x) + -1y = 2x + -7
(-9 * 3 + x * 3) + -1y = 2x + -7
(-27 + 3x) + -1y = 2x + -7

Reorder the terms:
-27 + 3x + -1y = -7 + 2x

Solving
-27 + 3x + -1y = -7 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
-27 + 3x + -2x + -1y = -7 + 2x + -2x

Combine like terms: 3x + -2x = 1x
-27 + 1x + -1y = -7 + 2x + -2x

Combine like terms: 2x + -2x = 0
-27 + 1x + -1y = -7 + 0
-27 + 1x + -1y = -7

Add '27' to each side of the equation.
-27 + 1x + 27 + -1y = -7 + 27

Reorder the terms:
-27 + 27 + 1x + -1y = -7 + 27

Combine like terms: -27 + 27 = 0
0 + 1x + -1y = -7 + 27
1x + -1y = -7 + 27

Combine like terms: -7 + 27 = 20
1x + -1y = 20

Add 'y' to each side of the equation.
1x + -1y + y = 20 + y

Combine like terms: -1y + y = 0
1x + 0 = 20 + y
1x = 20 + y

Divide each side by '1'.
x = 20 + y

Simplifying
x = 20 + y

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