3+10a-8=15

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Solution for 3+10a-8=15 equation: 


Simplifying
3 + 10a + -8 = 15

Reorder the terms:
3 + -8 + 10a = 15

Combine like terms: 3 + -8 = -5
-5 + 10a = 15

Solving
-5 + 10a = 15

Solving for variable 'a'.

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

Add '5' to each side of the equation.
-5 + 5 + 10a = 15 + 5

Combine like terms: -5 + 5 = 0
0 + 10a = 15 + 5
10a = 15 + 5

Combine like terms: 15 + 5 = 20
10a = 20

Divide each side by '10'.
a = 2

Simplifying
a = 2

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