Answer:
a=0.2b
Explanation:
Simplifying
(3a + -1b) + 2a = 0
Remove parenthesis around (3a + -1b)
3a + -1b + 2a = 0
Reorder the terms:
3a + 2a + -1b = 0
Combine like terms: 3a + 2a = 5a
5a + -1b = 0
Solving
5a + -1b = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add 'b' to each side of the equation.
5a + -1b + b = 0 + b
Combine like terms: -1b + b = 0
5a + 0 = 0 + b
5a = 0 + b
Remove the zero:
5a = b
Divide each side by '5'.
a = 0.2b
Simplifying
a = 0.2b