Answer:
k=8
Step-by-step explanation:
Cab 1 : 1/km
Cab2: 0.5 /km with Base charge =4
x=0.5 x+4
x-0.5x=4
0.5x=4
4/0.5=x
x=8
Assume x=k
k=8
Variable equals 12
Equation equals 16m+12b=112
Solution you just divide 112 by the product of 16+12
a+b+c=-1
a=1
b=-1
c=-1
So for this u just replace the letters
not sure about x+y=7
That is also 21/4 * 8/5 = (21*8)/(4*5) = 168/20 = 8 and 2/5
