Answer:B=17-R
Step-by-step explanation:
I am not sure how to simplify this equation further. We know that B+R= 17 (pens) ---- so--- 17-R=B
Answer:

Step-by-step explanation:

Combine like terms

Distribute the 7

Subtract 3m from each side

Add 7 to each side

Divide by 4

X = 23
If you need an explanation please comment! ^^
Answer:
25 km
Step-by-step explanation: