Question

Faith mixes 14 liters of 12% acid solution with a 30% acid solution, which results in an 18% acid solution. let x represent the number of liters of 30% acid solution used, and let y represent the number of liters of mixture. which system of equations can be used to find the number of liters of 30% acid solution in the mixture?

Answer 1

.14(12)+.30x=.18y where "y" = .14*x Solution as follows: 1.68+.30x=2.52+.18x then .30x-.18x=2.52-1.68 then .12x=.84 therefore x=7