(absolute-value, linear systems, and matrices)

Lisa bought 9 gallons of ice cream

Step-by-step explanation:

lets take "x" as the gallons of lemonade

if Lisa made purchases worth $34 that is what our equation will e equal to

ice cream:7.5 per gallon

milk: 2.5 per gallon

lemonade: 3 per gallon

since Lisa purchases 4 gallons of milk and 2 gallons of ice cream we will multiply that by the unit money for each food respectively:

7.5(2)+2.5(4)+X=34

SIMPLIFY:

15+10+x=34

15+10=25

25+x=34

25-25+x=34-25

x=9

Lisa bought 9 gallons of ice cream

hope this helps!

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