5(x-y)+7(x+y)=79

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Solution for 5(x-y)+7(x+y)=79 equation:


Simplifying
5(x + -1y) + 7(x + y) = 79
(x * 5 + -1y * 5) + 7(x + y) = 79
(5x + -5y) + 7(x + y) = 79
5x + -5y + (x * 7 + y * 7) = 79
5x + -5y + (7x + 7y) = 79

Reorder the terms:
5x + 7x + -5y + 7y = 79

Combine like terms: 5x + 7x = 12x
12x + -5y + 7y = 79

Combine like terms: -5y + 7y = 2y
12x + 2y = 79

Solving
12x + 2y = 79

Solving for variable 'x'.

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

Add '-2y' to each side of the equation.
12x + 2y + -2y = 79 + -2y

Combine like terms: 2y + -2y = 0
12x + 0 = 79 + -2y
12x = 79 + -2y

Divide each side by '12'.
x = 6.583333333 + -0.1666666667y

Simplifying
x = 6.583333333 + -0.1666666667y

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