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Verdich [7]
3 years ago
14

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

Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
8 0

Answer:

Jack is 8

Step-by-step 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

My name is Ann [436]3 years ago
5 0

Answer:

Jack is 8 years old

Step-by-step explanation:

X2 +5=21

21-5=16%2=8

Jack is 8 years old

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