8y+9=7y-4

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Solution for 8y+9=7y-4 equation:


Simplifying
8y + 9 = 7y + -4

Reorder the terms:
9 + 8y = 7y + -4

Reorder the terms:
9 + 8y = -4 + 7y

Solving
9 + 8y = -4 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
9 + 8y + -7y = -4 + 7y + -7y

Combine like terms: 8y + -7y = 1y
9 + 1y = -4 + 7y + -7y

Combine like terms: 7y + -7y = 0
9 + 1y = -4 + 0
9 + 1y = -4

Add '-9' to each side of the equation.
9 + -9 + 1y = -4 + -9

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

Combine like terms: -4 + -9 = -13
1y = -13

Divide each side by '1'.
y = -13

Simplifying
y = -13

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