7-a=3.5

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Solution for 7-a=3.5 equation: 


Simplifying
7 + -1a = 3.5

Solving
7 + -1a = 3.5

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 + -1a = 3.5 + -7

Combine like terms: 7 + -7 = 0
0 + -1a = 3.5 + -7
-1a = 3.5 + -7

Combine like terms: 3.5 + -7 = -3.5
-1a = -3.5

Divide each side by '-1'.
a = 3.5

Simplifying
a = 3.5

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