exam Maths Puzzle Numerical Ability

If a certain number is 3 more than 7 times itself, what is the number?

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exam Other Question

Solve the following system of linear inequalities by graphing.
x - y less than but equal to 3
x + 2y less than but equal to 6 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?