-15=a-40

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Solution for -15=a-40 equation:


Simplifying
-15 = a + -40

Reorder the terms:
-15 = -40 + a

Solving
-15 = -40 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-15 + -1a = -40 + a + -1a

Combine like terms: a + -1a = 0
-15 + -1a = -40 + 0
-15 + -1a = -40

Add '15' to each side of the equation.
-15 + 15 + -1a = -40 + 15

Combine like terms: -15 + 15 = 0
0 + -1a = -40 + 15
-1a = -40 + 15

Combine like terms: -40 + 15 = -25
-1a = -25

Divide each side by '-1'.
a = 25

Simplifying
a = 25

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