math
posted by jiya
clearly define variables. set up the equations.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol?
x represents?
y represents?
equation 1?
equation 2?

Reiny
amount of 30% solution  x gal
amount of 14% stuff  60x
solve for x
.30x + .14(60x) = .20(60)
or if you want two variables:
x+y = 60
.30x + .14y = .20(60)
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