y+2z+2z=9

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Solution for y+2z+2z=9 equation: 


Simplifying
y + 2z + 2z = 9

Combine like terms: 2z + 2z = 4z
y + 4z = 9

Solving
y + 4z = 9

Solving for variable 'y'.

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

Add '-4z' to each side of the equation.
y + 4z + -4z = 9 + -4z

Combine like terms: 4z + -4z = 0
y + 0 = 9 + -4z
y = 9 + -4z

Simplifying
y = 9 + -4z

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