Find the values for m and b in the following system so that the solution to the system is (-3,4)?

Question

5x+7y=b
mx+y=22

Answer 1

Answer: b = 13; m = -6

How I found the answer:
(5*x)+(7*y)=b
(5*-3)+(7*4)=13

(22-y)/x=m
(22-4)/(-3)=-6

Answer 2

4% salt answer = 0.04a sixteen% salt answer = 0.16b the situation a and b are the quantity required a + b = 600 (a*0.04) / 600 + (b*0.sixteen) / 600 = 0.a million a/15000 + b/3750 = 0.a million a = 3 hundred milliliters b = 3 hundred milliliters