21+3y-7=13y-10-4y

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Solution for 21+3y-7=13y-10-4y equation:


Simplifying
21 + 3y + -7 = 13y + -10 + -4y

Reorder the terms:
21 + -7 + 3y = 13y + -10 + -4y

Combine like terms: 21 + -7 = 14
14 + 3y = 13y + -10 + -4y

Reorder the terms:
14 + 3y = -10 + 13y + -4y

Combine like terms: 13y + -4y = 9y
14 + 3y = -10 + 9y

Solving
14 + 3y = -10 + 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.
14 + 3y + -9y = -10 + 9y + -9y

Combine like terms: 3y + -9y = -6y
14 + -6y = -10 + 9y + -9y

Combine like terms: 9y + -9y = 0
14 + -6y = -10 + 0
14 + -6y = -10

Add '-14' to each side of the equation.
14 + -14 + -6y = -10 + -14

Combine like terms: 14 + -14 = 0
0 + -6y = -10 + -14
-6y = -10 + -14

Combine like terms: -10 + -14 = -24
-6y = -24

Divide each side by '-6'.
y = 4

Simplifying
y = 4

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