2y-(7-5)-21=0

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Solution for 2y-(7-5)-21=0 equation:


Simplifying
2y + -1(7 + -5) + -21 = 0

Combine like terms: 7 + -5 = 2
2y + -1(2) + -21 = 0

Multiply -1 * 2
2y + -2 + -21 = 0

Reorder the terms:
-2 + -21 + 2y = 0

Combine like terms: -2 + -21 = -23
-23 + 2y = 0

Solving
-23 + 2y = 0

Solving for variable 'y'.

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

Add '23' to each side of the equation.
-23 + 23 + 2y = 0 + 23

Combine like terms: -23 + 23 = 0
0 + 2y = 0 + 23
2y = 0 + 23

Combine like terms: 0 + 23 = 23
2y = 23

Divide each side by '2'.
y = 11.5

Simplifying
y = 11.5

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