15=3a-45

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Solution for 15=3a-45 equation:


Simplifying
15 = 3a + -45

Reorder the terms:
15 = -45 + 3a

Solving
15 = -45 + 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 + -3a = -45 + 3a + -3a

Combine like terms: 3a + -3a = 0
15 + -3a = -45 + 0
15 + -3a = -45

Add '-15' to each side of the equation.
15 + -15 + -3a = -45 + -15

Combine like terms: 15 + -15 = 0
0 + -3a = -45 + -15
-3a = -45 + -15

Combine like terms: -45 + -15 = -60
-3a = -60

Divide each side by '-3'.
a = 20

Simplifying
a = 20

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