3+7a=5-a

Solution for 3+7a=5-a equation:

Simplifying
3 + 7a = 5 + -1a

Solving
3 + 7a = 5 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
3 + 7a + a = 5 + -1a + a

Combine like terms: 7a + a = 8a
3 + 8a = 5 + -1a + a

Combine like terms: -1a + a = 0
3 + 8a = 5 + 0
3 + 8a = 5

Add '-3' to each side of the equation.
3 + -3 + 8a = 5 + -3

Combine like terms: 3 + -3 = 0
0 + 8a = 5 + -3
8a = 5 + -3

Combine like terms: 5 + -3 = 2
8a = 2

Divide each side by '8'.
a = 0.25

Simplifying
a = 0.25