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

2 Answers

4 votes

Answer:

Jack is 8 years old

Explanation:

X2 +5=21

21-5=16%2=8

Jack is 8 years old

User Atmelino
by
4.3k points
2 votes

Answer:

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

User Karadur
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4.5k points