a*3+2=13

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Solution for a*3+2=13 equation: 


Simplifying
a * 3 + 2 = 13

Reorder the terms for easier multiplication:
3a + 2 = 13

Reorder the terms:
2 + 3a = 13

Solving
2 + 3a = 13

Solving for variable 'a'.

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

Add '-2' to each side of the equation.
2 + -2 + 3a = 13 + -2

Combine like terms: 2 + -2 = 0
0 + 3a = 13 + -2
3a = 13 + -2

Combine like terms: 13 + -2 = 11
3a = 11

Divide each side by '3'.
a = 3.666666667

Simplifying
a = 3.666666667

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