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10 cards from this deck
Setting up and solving linear equations in 2 variables
What varies in the problem
Build expression for first variable (cost × variable)
Combine expressions together
Substitute specific values and evaluate
C=ax+byC = ax + byC=ax+by where aaa, bbb are unit costs
Replacing variables with actual numbers
If x=0x = 0x=0 and y=0y = 0y=0, cost should be zero
Two decimal places (dollars and cents)
axaxax dollars
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