The square of a certain number is the
same as three times the number.
What is the number?

3 x 3 = 9 or 3²=9

Step-by-step explanation:

Multiply both sides by 1/x

x=3

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!