15+3a=17-a

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Solution for 15+3a=17-a equation:


Simplifying
15 + 3a = 17 + -1a

Solving
15 + 3a = 17 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
15 + 3a + a = 17 + -1a + a

Combine like terms: 3a + a = 4a
15 + 4a = 17 + -1a + a

Combine like terms: -1a + a = 0
15 + 4a = 17 + 0
15 + 4a = 17

Add '-15' to each side of the equation.
15 + -15 + 4a = 17 + -15

Combine like terms: 15 + -15 = 0
0 + 4a = 17 + -15
4a = 17 + -15

Combine like terms: 17 + -15 = 2
4a = 2

Divide each side by '4'.
a = 0.5

Simplifying
a = 0.5

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