10+11=y-1

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Solution for 10+11=y-1 equation:


Simplifying
10 + 11 = y + -1

Combine like terms: 10 + 11 = 21
21 = y + -1

Reorder the terms:
21 = -1 + y

Solving
21 = -1 + 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.
21 + -1y = -1 + y + -1y

Combine like terms: y + -1y = 0
21 + -1y = -1 + 0
21 + -1y = -1

Add '-21' to each side of the equation.
21 + -21 + -1y = -1 + -21

Combine like terms: 21 + -21 = 0
0 + -1y = -1 + -21
-1y = -1 + -21

Combine like terms: -1 + -21 = -22
-1y = -22

Divide each side by '-1'.
y = 22

Simplifying
y = 22

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