Question

Twice jacks age plus five is 21. Write and solve an equation. How old is jack

Answer 1

Jack is 8 years old

Explanation:

X2 +5=21

21-5=16%2=8

Jack is 8 years old

Answer 2

Jack is 8

Explanation:

j= jacks age

2j+5 =21

This is the equation from Twice jacks age plus five is 21

We want to isolate j

Subtract 5 from each side

2j+5 =21

2j+5-5 = 21-5

2j = 16

Divide by 2

2j/2 =16/2

j =8