Answer
Explanation
Let the cost of 1 pencil be p
Let the cost of 1 notebook be n
The cost of 2 pencils and 3 notebooks is 3.35
2p + 3n = 3.35
The cost of 4 pencils and 2 notebooks is 3.70
4p + 2n = 3.70
We can then combine the two equations and solve simultaneously
2p + 3n = 3.35
4p + 2n = 3.70
Multiply the first equation by 2 and the second equation by 1
(2p + 3n = 3.35) × 2
(4p + 2n = 3.70) × 1
