3y+15=4y-20

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Solution for 3y+15=4y-20 equation:


Simplifying
3y + 15 = 4y + -20

Reorder the terms:
15 + 3y = 4y + -20

Reorder the terms:
15 + 3y = -20 + 4y

Solving
15 + 3y = -20 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
15 + 3y + -4y = -20 + 4y + -4y

Combine like terms: 3y + -4y = -1y
15 + -1y = -20 + 4y + -4y

Combine like terms: 4y + -4y = 0
15 + -1y = -20 + 0
15 + -1y = -20

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

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

Combine like terms: -20 + -15 = -35
-1y = -35

Divide each side by '-1'.
y = 35

Simplifying
y = 35

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