Linear systems solve by elimination
3x+2y−z=8
−3x+4y+5z=−14
x−3y+4z=−14

Kelly is three years younger than her sister. the sum of their ages is 34 years. how old is kelly and how old is her sister?

Afruit stand has to decide what to charge for their produce. they need $10 for 4 apples and 4 oranges. they also need $15 for 6 apples and 6 oranges. we put this information into a system of linear equations. can we find a unique price for an apple and an orange?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.