-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 = -7y
-15 + -7y = 20 + 4y + -4y

Combine like terms: 4y + -4y = 0
-15 + -7y = 20 + 0
-15 + -7y = 20

Add '15' to each side of the equation.
-15 + 15 + -7y = 20 + 15

Combine like terms: -15 + 15 = 0
0 + -7y = 20 + 15
-7y = 20 + 15

Combine like terms: 20 + 15 = 35
-7y = 35

Divide each side by '-7'.
y = -5

Simplifying
y = -5

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