7x+y=-9

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Solution for 7x+y=-9 equation: 


Simplifying
7x + y = -9

Solving
7x + y = -9

Solving for variable 'x'.

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

Add '-1y' to each side of the equation.
7x + y + -1y = -9 + -1y

Combine like terms: y + -1y = 0
7x + 0 = -9 + -1y
7x = -9 + -1y

Divide each side by '7'.
x = -1.285714286 + -0.1428571429y

Simplifying
x = -1.285714286 + -0.1428571429y

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