10y+3y-21=18y+36

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Solution for 10y+3y-21=18y+36 equation:


Simplifying
10y + 3y + -21 = 18y + 36

Reorder the terms:
-21 + 10y + 3y = 18y + 36

Combine like terms: 10y + 3y = 13y
-21 + 13y = 18y + 36

Reorder the terms:
-21 + 13y = 36 + 18y

Solving
-21 + 13y = 36 + 18y

Solving for variable 'y'.

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

Add '-18y' to each side of the equation.
-21 + 13y + -18y = 36 + 18y + -18y

Combine like terms: 13y + -18y = -5y
-21 + -5y = 36 + 18y + -18y

Combine like terms: 18y + -18y = 0
-21 + -5y = 36 + 0
-21 + -5y = 36

Add '21' to each side of the equation.
-21 + 21 + -5y = 36 + 21

Combine like terms: -21 + 21 = 0
0 + -5y = 36 + 21
-5y = 36 + 21

Combine like terms: 36 + 21 = 57
-5y = 57

Divide each side by '-5'.
y = -11.4

Simplifying
y = -11.4

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