Answer:
192
Step-by-step explanation: idk tho so it might be right ok so dont get mad at me
You would divide b on both side so you can get x=-7/b
Step-by-step explanation:
A
Answer:

Step-by-step explanation:
Let
denotes number of pencils, markers, erasers respectively.
For Andrea:

For Justin:

For Virginia:

On subtracting equations (i) and (ii), we get

Put
in equation (i)

Put
in equation (iii)

Multiply equation (iv) by 5 and equation (v) by 6 and then subtract both the equations.

Put
in equation 

Put
in equation (i)
