Whats 15-b=4b-5 (5-3)

15-b=4b-5 (5-3)

Multiply the bracket by - 5

(-5) (5) = -25

(-5) (-3) = 15

15-b=4b-25+15

15-b=4b-10

Move 15 to the other side

Sign changes from + 15 to - 15

15-15-b=4b-10-15

-b=4b-25

Move 4b to the other side.

-b-4b=4b-4b-25

-b-4b=-25

-5b=-25

divide both sides by - 5

-5b/-5=-25/-5

Answer: b=5