3+5a=28

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Solution for 3+5a=28 equation: 


Simplifying
3 + 5a = 28

Solving
3 + 5a = 28

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + 5a = 28 + -3

Combine like terms: 3 + -3 = 0
0 + 5a = 28 + -3
5a = 28 + -3

Combine like terms: 28 + -3 = 25
5a = 25

Divide each side by '5'.
a = 5

Simplifying
a = 5

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