math_celebrity Administrator Staff member Mar 5, 2017 #1 John spent $10.40 on 5 notebooks and 5 pens. Ariana spent $7.00 on 4 notebooks and 2 pens. What is the ost of 1 notebook and what is the cost of 1 pen? Let the number of notebooks be n and the number of pens be p. We have two equations: 5n + 5p = 10.40 4n + 2p = 7 Using our simultaneous equation calculator, we have: n = 1.42 p = 0.66

John spent $10.40 on 5 notebooks and 5 pens. Ariana spent $7.00 on 4 notebooks and 2 pens. What is the ost of 1 notebook and what is the cost of 1 pen? Let the number of notebooks be n and the number of pens be p. We have two equations: 5n + 5p = 10.40 4n + 2p = 7 Using our simultaneous equation calculator, we have: n = 1.42 p = 0.66