Super how many gallons of a 60% antifreeze solution must be mixed with a 60 gallons of 15% antifreeze to get a mixture that is 50% antifreeze? use the six-step method.

bellamore

Middle SchoolMathematics 5+3 pts

x (.60) + 60 (.15) = (x+60) .50

distribute

.60x +9 = .5x +30

subtract  .5x from each side

.1x +9 = 30

subtract 9 from each side

.1x = 21

 divide by .1

x = 210

You will need 210 gallons of 60% antifreeze

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