7y-2(y+20)=9y+20

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Solution for 7y-2(y+20)=9y+20 equation:


Simplifying
7y + -2(y + 20) = 9y + 20

Reorder the terms:
7y + -2(20 + y) = 9y + 20
7y + (20 * -2 + y * -2) = 9y + 20
7y + (-40 + -2y) = 9y + 20

Reorder the terms:
-40 + 7y + -2y = 9y + 20

Combine like terms: 7y + -2y = 5y
-40 + 5y = 9y + 20

Reorder the terms:
-40 + 5y = 20 + 9y

Solving
-40 + 5y = 20 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
-40 + 5y + -9y = 20 + 9y + -9y

Combine like terms: 5y + -9y = -4y
-40 + -4y = 20 + 9y + -9y

Combine like terms: 9y + -9y = 0
-40 + -4y = 20 + 0
-40 + -4y = 20

Add '40' to each side of the equation.
-40 + 40 + -4y = 20 + 40

Combine like terms: -40 + 40 = 0
0 + -4y = 20 + 40
-4y = 20 + 40

Combine like terms: 20 + 40 = 60
-4y = 60

Divide each side by '-4'.
y = -15

Simplifying
y = -15

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