7y-10=8y-9

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Solution for 7y-10=8y-9 equation:


Simplifying
7y + -10 = 8y + -9

Reorder the terms:
-10 + 7y = 8y + -9

Reorder the terms:
-10 + 7y = -9 + 8y

Solving
-10 + 7y = -9 + 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
-10 + 7y + -8y = -9 + 8y + -8y

Combine like terms: 7y + -8y = -1y
-10 + -1y = -9 + 8y + -8y

Combine like terms: 8y + -8y = 0
-10 + -1y = -9 + 0
-10 + -1y = -9

Add '10' to each side of the equation.
-10 + 10 + -1y = -9 + 10

Combine like terms: -10 + 10 = 0
0 + -1y = -9 + 10
-1y = -9 + 10

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

Divide each side by '-1'.
y = -1

Simplifying
y = -1

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