15+2a=3a-15

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Solution for 15+2a=3a-15 equation:


Simplifying
15 + 2a = 3a + -15

Reorder the terms:
15 + 2a = -15 + 3a

Solving
15 + 2a = -15 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
15 + 2a + -3a = -15 + 3a + -3a

Combine like terms: 2a + -3a = -1a
15 + -1a = -15 + 3a + -3a

Combine like terms: 3a + -3a = 0
15 + -1a = -15 + 0
15 + -1a = -15

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

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

Combine like terms: -15 + -15 = -30
-1a = -30

Divide each side by '-1'.
a = 30

Simplifying
a = 30

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