Question

(5a+4)-(5a+3)

Answer 1

Simplifying
(5a + 4) + -1(5a + 3) = 0

Reorder the terms:
(4 + 5a) + -1(5a + 3) = 0

Remove parenthesis around (4 + 5a)
4 + 5a + -1(5a + 3) = 0

Reorder the terms:
4 + 5a + -1(3 + 5a) = 0
4 + 5a + (3 * -1 + 5a * -1) = 0
4 + 5a + (-3 + -5a) = 0

Reorder the terms:
4 + -3 + 5a + -5a = 0

Combine like terms: 4 + -3 = 1
1 + 5a + -5a = 0

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

Solving
1 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.