Question

Write the equation, use “X” to represent the unknown number. Solve for the unknown

20. The difference between a number and 16 is the square of (-5)

21. When three times A number is increased by five, The result is 10.

22. When is 3 sevenths of a number is decreased by two, The result is eight

Answer 1

Step-by-step explanation:

20)

x - 16 = (-5)²

x - 16 = 25

x = 25 + 16

x = 41

21)

3x + 5 = 10

3x = 10 - 5

3x = 5

x = 5/3

22)

3/7 of x - 2 = 8

3x - 14/7 = 8

3x - 14 = 8 × 7

3x - 14 = 56

3x = 56 + 14

3x = 70

x = 70/3