2x+4=9-y

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Solution for 2x+4=9-y equation: 


Simplifying
2x + 4 = 9 + -1y

Reorder the terms:
4 + 2x = 9 + -1y

Solving
4 + 2x = 9 + -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 + 2x = 9 + -4 + -1y

Combine like terms: 4 + -4 = 0
0 + 2x = 9 + -4 + -1y
2x = 9 + -4 + -1y

Combine like terms: 9 + -4 = 5
2x = 5 + -1y

Divide each side by '2'.
x = 2.5 + -0.5y

Simplifying
x = 2.5 + -0.5y

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