The Everton College store paid $1710 for an order of 45 calculators. The store paid $9 for each scientific calculator. The others, all graphing calculators, cost the store $55 each. How many of each type of calculator was ordered?

The store ordered-scientific calculators and -graphing calculators.

Question

The Everton College store paid $1710 for an order of 45 calculators. The store paid $9 for each scientific calculator. The others, all graphing calculators, cost the store $55 each. How many of each type of calculator was ordered?

The store ordered-scientific calculators and -graphing calculators.

anonymous · Answer

x+y=45
9x+55y=1710

anonymous · Answer

let x = $9
let y= $ 55
x+y=1710,   y=1710-x
9x+55y=1710
substitution and solve