exam Maths Puzzle Numerical Ability

can you help me solve this problem

12 5
 +  = 1
3x-2 x+4

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exam Other Question

I have no idea what this is called but a sample problem is ax+by=c and you have to solve for y. Can someone help out with this problem

The Patrick County 4-H club has $300 to spend on trees for the club's orchard. The club votes to plant both apple trees and pear trees. If