8y+15-4y=20-13

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Solution for 8y+15-4y=20-13 equation:


Simplifying
8y + 15 + -4y = 20 + -13

Reorder the terms:
15 + 8y + -4y = 20 + -13

Combine like terms: 8y + -4y = 4y
15 + 4y = 20 + -13

Combine like terms: 20 + -13 = 7
15 + 4y = 7

Solving
15 + 4y = 7

Solving for variable 'y'.

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

Add '-15' to each side of the equation.
15 + -15 + 4y = 7 + -15

Combine like terms: 15 + -15 = 0
0 + 4y = 7 + -15
4y = 7 + -15

Combine like terms: 7 + -15 = -8
4y = -8

Divide each side by '4'.
y = -2

Simplifying
y = -2

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