book Maths Puzzle Numerical Ability

if three times the smaller of two consecutive integers is added to four times the larger, the result is 130. find the smaller integer.

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book Other Question

A coffee merchant has coffee beans that sell for $9 per
pound and $12 per pound. The two types are to be mixed to create 100 lb of a mixture that will sell for $11.25 per pound. How much of each type of bean should be used in the mixture? how do you find all solutions

x^2+3x+6=4

there is a division sign over the whole equation