write and solve a system of equations
I dont know how to do that
start by defining two variables let s = number of hours used for the Scott family let p = number of hours used by the Phillips family
p + s = 50
20p + 30s = 1300 p + s = 50 solve for p and s
thats the part im stuck on
start by multiplying the second equation by 20
I said the second one
doesnt make any sense
here are your two equations 20p + 30s = 1300 p + s = 50 multiply the second equation by 20
50*20 = ?
now we have 20p + 30s = 1300 20p + 20s = 1000 now subtract the two equations.
good now find s...
great, now go back and find p
we know that p + s = 50, so what is p?
s = 30 p = ?
ty have a few more up to helping me