-21+5+y=-9+13

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Solution for -21+5+y=-9+13 equation: 


Simplifying
-21 + 5 + y = -9 + 13

Combine like terms: -21 + 5 = -16
-16 + y = -9 + 13

Combine like terms: -9 + 13 = 4
-16 + y = 4

Solving
-16 + y = 4

Solving for variable 'y'.

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

Add '16' to each side of the equation.
-16 + 16 + y = 4 + 16

Combine like terms: -16 + 16 = 0
0 + y = 4 + 16
y = 4 + 16

Combine like terms: 4 + 16 = 20
y = 20

Simplifying
y = 20

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