Question

How do i do this?? Can you please help ? :

Answer 1

Since skatergirl has already done question 4, here is the solution for question 5. Feel free to ask if you are unsure of any step! :)

Answer 2

4. −3(b−4)=−2b
= −3b+12=−2b
= −3b+12+2b=−2b+2b = −b+12=0
= −b+12−12=0−12 = −b=−12
= −b−1=−12−1
b=12