Assign two variables for each problem, and write the equations. Do not solve.
2 answers:
1. x represents one battery, y represents the other battery
x+y=6.5
x-y=2.5
2. x represents the number of small drinks sold, y represents the number of other size drinks sold
x+y=230
x+1.5y=285
A = first battery type b = second battery type a + b = 6.5 V a = ( 6.5 V ) - b b - a = 2.5 V b - (6.5 - b) = 2.5 2b - 6.5 = 2.5 2b = 9.0 b = 4.5 V a = 6.5 - 4.5 a = 2.0 V
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Answer:
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