4x+7y=-80

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Solution for 4x+7y=-80 equation: 


Simplifying
4x + 7y = -80

Solving
4x + 7y = -80

Solving for variable 'x'.

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

Add '-7y' to each side of the equation.
4x + 7y + -7y = -80 + -7y

Combine like terms: 7y + -7y = 0
4x + 0 = -80 + -7y
4x = -80 + -7y

Divide each side by '4'.
x = -20 + -1.75y

Simplifying
x = -20 + -1.75y

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