13=y+9

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Solution for 13=y+9 equation:


Simplifying
13 = y + 9

Reorder the terms:
13 = 9 + y

Solving
13 = 9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
13 + -1y = 9 + y + -1y

Combine like terms: y + -1y = 0
13 + -1y = 9 + 0
13 + -1y = 9

Add '-13' to each side of the equation.
13 + -13 + -1y = 9 + -13

Combine like terms: 13 + -13 = 0
0 + -1y = 9 + -13
-1y = 9 + -13

Combine like terms: 9 + -13 = -4
-1y = -4

Divide each side by '-1'.
y = 4

Simplifying
y = 4

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