7-4y=9

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Solution for 7-4y=9 equation: 


Simplifying
7 + -4y = 9

Solving
7 + -4y = 9

Solving for variable 'y'.

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

Add '-7' to each side of the equation.
7 + -7 + -4y = 9 + -7

Combine like terms: 7 + -7 = 0
0 + -4y = 9 + -7
-4y = 9 + -7

Combine like terms: 9 + -7 = 2
-4y = 2

Divide each side by '-4'.
y = -0.5

Simplifying
y = -0.5

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