Answer:
Value of b is all the numbers.
All the numbers will satisfy the value of b.
Step-by-step explanation:
4b + 21 = b + 3 ( b + 7 )
4b + 21 = b + 3b + 21
4b + 21 = 4b + 21
83,034.6 - 82,803.6 = 231 miles
231/16.5 = 14 miles per gallon
2x+4y=12 ------>1
y=1/2x-3. ------->2
2 into 1
2x+4(1/2x-3)=12
2x+2x-12=12
4x-12-12=0
4x-24=0
4x=24
x=24/4
x=6 ------> 3
3 into 2
y=1/2x-3
y=1/2(6)-3
y/=0
sorry if Im wrong or my is incorrect
I may not help. But i believe it is something to do with the lowest common multiple between those 2 being 60
