what 2 digit number is equal to twice the product of its digits?

unknown values: n

equation: n = 10*a+b

equation: n = 2*ab

answer: 36

In an even 2-digit number, the second digit is 3 times the first. what is the number?

unknown values: n

equation: n = 10*a + b

equation: b = 3*a

answer: 26

The difference between six times a number and 9 is equal to five times the sum of the number and 2. find the number

unknown values: k

equation: 6*k-9=5*(k+2)

answer: 19

if the sum of a number and seven is tripled, the result is two less than twice the number. find the number?

unknown values: n

equation: 3(n + 7) = 2*n - 2

answer: -23

Robert thinks of a number. When he multiples his number by 5 and subtracts 16 from the result, he gets the same answer as to when he adds 10 to his number and multiples the result by 3. Find the number Robert is thinking of.

unknown values: x

equation: 5*x - 16 = (x + 10) * 3

answer: 23

the sum of two times a number and eight is equal to three times the difference between the number and four. What's the number?

unknown values: n

equation: 2*n + 8 = 3(n - 4)

answer: 20

twice the sum of a number and sixteen is five less than three times the number?find the number?

unknown values: n

equation: 2(n + 16) = 3*n - 5

answer: 37

The product of two consecutive even integers is 4 more than 5 times the smaller of the two integers. Find the integers.

unknown values: 2*k,2*k+2

equation: 2*k*(2*k+2)=5*2*k+4

answer: 4; 6

Find 4 consecutive even integers such that four less than twice the smallest is equal to three times the largest, increased by two.

unknown values: 2*k,2*k+2,2*k+4,2*k+6

equation: 2*2*k - 4 = 3*(2*k+6) + 2

answer: -24;-22;-20;-18

The difference between a number and its reciprocal is 7/12. Find the number.

unknown values: x

equation: x-1/x=7/12

answer: 4/3 or -3/4 | 1.333 or -0.75