6p+10p+15-9
16p+6 will be your final answer
q= 6
r= 7
work--
Multiply 1st column by -2:
-30q+8r=-124
5q+8r=86
Subtract 2nd column from the first column:
-35q= -210
Solve for q:
q=6
Subtract q=6 by any of the two equations, so:
-30q+8r=-124
-30*6+8r=-124
Solve for r:
r=7
PB = 12 (P=1, B=2) Numerical values are assigned to each letter and each letter takes on a single number.
That's the "unit rate."
115 miles
-------------- = 46 mph = average speed
2.5 hours
