exam Maths Puzzle Numerical Ability

3(1+d)-5=3d-2

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exam Other Question

Bologna sells for $1.50 a pound. Salami sells for $2.50 a pound. How much of each should be used to have ten pounds of a mixture of both selling for $1.75 a pound? Solve both inequalites

1.) Fifteen is greater than a number minus 7.

2.) A number plus 11 is less than or equal to 9.

Thanks so much.