.4a+7=13

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Solution for .4a+7=13 equation: 


Simplifying
0.4a + 7 = 13

Reorder the terms:
7 + 0.4a = 13

Solving
7 + 0.4a = 13

Solving for variable 'a'.

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

Add '-7' to each side of the equation.
7 + -7 + 0.4a = 13 + -7

Combine like terms: 7 + -7 = 0
0 + 0.4a = 13 + -7
0.4a = 13 + -7

Combine like terms: 13 + -7 = 6
0.4a = 6

Divide each side by '0.4'.
a = 15

Simplifying
a = 15

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