A=(5b)(13a)+(7b)(5a)

Solution for A=(5b)(13a)+(7b)(5a) equation:

Simplifying
A = (5b)(13a) + (7b)(5a)

Remove parenthesis around (5b)
A = 5b(13a) + (7b)(5a)

Remove parenthesis around (13a)
A = 5b * 13a + (7b)(5a)

Reorder the terms for easier multiplication:
A = 5 * 13b * a + (7b)(5a)

Multiply 5 * 13
A = 65b * a + (7b)(5a)

Multiply b * a
A = 65ab + (7b)(5a)

Remove parenthesis around (7b)
A = 65ab + 7b(5a)

Remove parenthesis around (5a)
A = 65ab + 7b * 5a

Reorder the terms for easier multiplication:
A = 65ab + 7 * 5b * a

Multiply 7 * 5
A = 65ab + 35b * a

Multiply b * a
A = 65ab + 35ab

Combine like terms: 65ab + 35ab = 100ab
A = 100ab

Solving
A = 100ab

Solving for variable 'A'.

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

Simplifying
A = 100ab