x+(13-1y)=21

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Solution for x+(13-1y)=21 equation:


Simplifying
x + (13 + -1y) = 21

Remove parenthesis around (13 + -1y)
x + 13 + -1y = 21

Reorder the terms:
13 + x + -1y = 21

Solving
13 + x + -1y = 21

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + x + -13 + -1y = 21 + -13

Reorder the terms:
13 + -13 + x + -1y = 21 + -13

Combine like terms: 13 + -13 = 0
0 + x + -1y = 21 + -13
x + -1y = 21 + -13

Combine like terms: 21 + -13 = 8
x + -1y = 8

Add 'y' to each side of the equation.
x + -1y + y = 8 + y

Combine like terms: -1y + y = 0
x + 0 = 8 + y
x = 8 + y

Simplifying
x = 8 + y

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