4y-21+5y=51

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Solution for 4y-21+5y=51 equation:


Simplifying
4y + -21 + 5y = 51

Reorder the terms:
-21 + 4y + 5y = 51

Combine like terms: 4y + 5y = 9y
-21 + 9y = 51

Solving
-21 + 9y = 51

Solving for variable 'y'.

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

Add '21' to each side of the equation.
-21 + 21 + 9y = 51 + 21

Combine like terms: -21 + 21 = 0
0 + 9y = 51 + 21
9y = 51 + 21

Combine like terms: 51 + 21 = 72
9y = 72

Divide each side by '9'.
y = 8

Simplifying
y = 8

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