21y-75=y-(-51)

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Solution for 21y-75=y-(-51) equation:


Simplifying
21y + -75 = y + -1(-51)

Reorder the terms:
-75 + 21y = y + -1(-51)

Multiply -1 * -51
-75 + 21y = y + 51

Reorder the terms:
-75 + 21y = 51 + y

Solving
-75 + 21y = 51 + 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.
-75 + 21y + -1y = 51 + y + -1y

Combine like terms: 21y + -1y = 20y
-75 + 20y = 51 + y + -1y

Combine like terms: y + -1y = 0
-75 + 20y = 51 + 0
-75 + 20y = 51

Add '75' to each side of the equation.
-75 + 75 + 20y = 51 + 75

Combine like terms: -75 + 75 = 0
0 + 20y = 51 + 75
20y = 51 + 75

Combine like terms: 51 + 75 = 126
20y = 126

Divide each side by '20'.
y = 6.3

Simplifying
y = 6.3

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