Frank is 7 years older than Riley. In 4 years the sum of their ages will be 69. How old is Frank now?

Frank is now 38 years old

ｅｘｐｌａｎａｔｉｏｎ:

Since the total will be 69, first you subtract the extra 7 years which leads you to 62. Then , you divide 62 by 2 which is 31. Finally you add 7 to 31 and you get 38.

ｍｙ ｗｏｒｋ:

69 – 7 = 62

62 ÷ 2 = 31

31 + 7 = 38

Hope this helps you

The density of the cube is 40

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.