21+4a=70

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Solution for 21+4a=70 equation: 


Simplifying
21 + 4a = 70

Solving
21 + 4a = 70

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + 4a = 70 + -21

Combine like terms: 21 + -21 = 0
0 + 4a = 70 + -21
4a = 70 + -21

Combine like terms: 70 + -21 = 49
4a = 49

Divide each side by '4'.
a = 12.25

Simplifying
a = 12.25

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