10+(-15)=-15+a

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Solution for 10+(-15)=-15+a equation:


Simplifying
10 + (-15) = -15 + a
10 + -15 = -15 + a

Combine like terms: 10 + -15 = -5
-5 = -15 + a

Solving
-5 = -15 + 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.
-5 + -1a = -15 + a + -1a

Combine like terms: a + -1a = 0
-5 + -1a = -15 + 0
-5 + -1a = -15

Add '5' to each side of the equation.
-5 + 5 + -1a = -15 + 5

Combine like terms: -5 + 5 = 0
0 + -1a = -15 + 5
-1a = -15 + 5

Combine like terms: -15 + 5 = -10
-1a = -10

Divide each side by '-1'.
a = 10

Simplifying
a = 10

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