(15y+13)+(20y+7)=90

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Solution for (15y+13)+(20y+7)=90 equation:


Simplifying
(15y + 13) + (20y + 7) = 90

Reorder the terms:
(13 + 15y) + (20y + 7) = 90

Remove parenthesis around (13 + 15y)
13 + 15y + (20y + 7) = 90

Reorder the terms:
13 + 15y + (7 + 20y) = 90

Remove parenthesis around (7 + 20y)
13 + 15y + 7 + 20y = 90

Reorder the terms:
13 + 7 + 15y + 20y = 90

Combine like terms: 13 + 7 = 20
20 + 15y + 20y = 90

Combine like terms: 15y + 20y = 35y
20 + 35y = 90

Solving
20 + 35y = 90

Solving for variable 'y'.

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

Add '-20' to each side of the equation.
20 + -20 + 35y = 90 + -20

Combine like terms: 20 + -20 = 0
0 + 35y = 90 + -20
35y = 90 + -20

Combine like terms: 90 + -20 = 70
35y = 70

Divide each side by '35'.
y = 2

Simplifying
y = 2

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