5(3+y)-5(4-y)=20

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Solution for 5(3+y)-5(4-y)=20 equation:


Simplifying
5(3 + y) + -5(4 + -1y) = 20
(3 * 5 + y * 5) + -5(4 + -1y) = 20
(15 + 5y) + -5(4 + -1y) = 20
15 + 5y + (4 * -5 + -1y * -5) = 20
15 + 5y + (-20 + 5y) = 20

Reorder the terms:
15 + -20 + 5y + 5y = 20

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

Combine like terms: 5y + 5y = 10y
-5 + 10y = 20

Solving
-5 + 10y = 20

Solving for variable 'y'.

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

Add '5' to each side of the equation.
-5 + 5 + 10y = 20 + 5

Combine like terms: -5 + 5 = 0
0 + 10y = 20 + 5
10y = 20 + 5

Combine like terms: 20 + 5 = 25
10y = 25

Divide each side by '10'.
y = 2.5

Simplifying
y = 2.5

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