3x+4=-y

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Solution for 3x+4=-y equation:


Simplifying
3x + 4 = -1y

Reorder the terms:
4 + 3x = -1y

Solving
4 + 3x = -1y

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 3x = -4 + -1y

Combine like terms: 4 + -4 = 0
0 + 3x = -4 + -1y
3x = -4 + -1y

Divide each side by '3'.
x = -1.333333333 + -0.3333333333y

Simplifying
x = -1.333333333 + -0.3333333333y

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