Question

7-3b = 5b+15 solve the equation

Answer 1

b=-1

Explanation:

we have isolate variable on one side and number on other

so we move 5b to the right side and it becomes negative and we move 7 to the left and it becomes negative

-3b-5b=15-7

-8b = 8

__ __ (you divided -8 by -8b to isolate b and by the other side)

-8 -8

b= -1

Answer 2

7-3b = 5b+15

move 5b to the other side

sign changes from +5b to -5b

7-3b-5b=5b-5b+15 ( combine like terms)

7-3b-5b=15

7-8b=15

move 7 to the other side

7-7-8b=15-7

-8b=15-7

-8b=8

divide both sides by -8

to get +b and by itself

-8b/-8=8/-8

Answer:

b=-1