Question 1008600
Let's call the first source x and the second source y:
x+y= 60 subtract x from both sides:
y= 60-x
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.25x+.50y= .30(60)
.25x+.50(60-x)= .30(60)
.25x+30-.50x= 18 Now subtract x on left and subtract 30 on both sides:
-.25x= -12 Divide both sides by -.25, and remember that -/- = +
x= 48 You need 48 gallons of .25 and 60-48= 12 gallon of .5