77-y=7+9y

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Solution for 77-y=7+9y equation:


Simplifying
77 + -1y = 7 + 9y

Solving
77 + -1y = 7 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
77 + -1y + -9y = 7 + 9y + -9y

Combine like terms: -1y + -9y = -10y
77 + -10y = 7 + 9y + -9y

Combine like terms: 9y + -9y = 0
77 + -10y = 7 + 0
77 + -10y = 7

Add '-77' to each side of the equation.
77 + -77 + -10y = 7 + -77

Combine like terms: 77 + -77 = 0
0 + -10y = 7 + -77
-10y = 7 + -77

Combine like terms: 7 + -77 = -70
-10y = -70

Divide each side by '-10'.
y = 7

Simplifying
y = 7

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