4y+15=20-y

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


Simplifying
4y + 15 = 20 + -1y

Reorder the terms:
15 + 4y = 20 + -1y

Solving
15 + 4y = 20 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
15 + 4y + y = 20 + -1y + y

Combine like terms: 4y + y = 5y
15 + 5y = 20 + -1y + y

Combine like terms: -1y + y = 0
15 + 5y = 20 + 0
15 + 5y = 20

Add '-15' to each side of the equation.
15 + -15 + 5y = 20 + -15

Combine like terms: 15 + -15 = 0
0 + 5y = 20 + -15
5y = 20 + -15

Combine like terms: 20 + -15 = 5
5y = 5

Divide each side by '5'.
y = 1

Simplifying
y = 1

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