31+y=4y+13

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Solution for 31+y=4y+13 equation:


Simplifying
31 + y = 4y + 13

Reorder the terms:
31 + y = 13 + 4y

Solving
31 + y = 13 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
31 + y + -4y = 13 + 4y + -4y

Combine like terms: y + -4y = -3y
31 + -3y = 13 + 4y + -4y

Combine like terms: 4y + -4y = 0
31 + -3y = 13 + 0
31 + -3y = 13

Add '-31' to each side of the equation.
31 + -31 + -3y = 13 + -31

Combine like terms: 31 + -31 = 0
0 + -3y = 13 + -31
-3y = 13 + -31

Combine like terms: 13 + -31 = -18
-3y = -18

Divide each side by '-3'.
y = 6

Simplifying
y = 6

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