16=4a-8a

Solution for 16=4a-8a equation:

Simplifying
16 = 4a + -8a

Combine like terms: 4a + -8a = -4a
16 = -4a

Solving
16 = -4a

Solving for variable 'a'.

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

Add '4a' to each side of the equation.
16 + 4a = -4a + 4a

Combine like terms: -4a + 4a = 0
16 + 4a = 0

Add '-16' to each side of the equation.
16 + -16 + 4a = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 4a = 0 + -16
4a = 0 + -16

Combine like terms: 0 + -16 = -16
4a = -16

Divide each side by '4'.
a = -4

Simplifying
a = -4