exam
Maths Puzzle
Numerical Ability
cashews sell for $5 per pound and peanuts sell for $2 per pound. How many pounds of each would you use to make 21 pounds of a mixture that sells for $3.00 per pound?
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exam Other Question
If a certain number is 3 more than 7 times itself, what is the number?
I am trying to solve these equations by substitution or elimination amd then I have to interpret the result. Each time I do it, my solution comes out to 0. Can someone help me understand this?
2x+4y=10
3x+6y=12