4+3a=31

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Solution for 4+3a=31 equation: 


Simplifying
4 + 3a = 31

Solving
4 + 3a = 31

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + 3a = 31 + -4

Combine like terms: 4 + -4 = 0
0 + 3a = 31 + -4
3a = 31 + -4

Combine like terms: 31 + -4 = 27
3a = 27

Divide each side by '3'.
a = 9

Simplifying
a = 9

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