-15=y-(-28)

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Solution for -15=y-(-28) equation:


Simplifying
-15 = y + -1(-28)

Multiply -1 * -28
-15 = y + 28

Reorder the terms:
-15 = 28 + y

Solving
-15 = 28 + 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.
-15 + -1y = 28 + y + -1y

Combine like terms: y + -1y = 0
-15 + -1y = 28 + 0
-15 + -1y = 28

Add '15' to each side of the equation.
-15 + 15 + -1y = 28 + 15

Combine like terms: -15 + 15 = 0
0 + -1y = 28 + 15
-1y = 28 + 15

Combine like terms: 28 + 15 = 43
-1y = 43

Divide each side by '-1'.
y = -43

Simplifying
y = -43

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