Henry was thinking of a number. Henry doubles it and gets an answer of 4. What was the original number?

Let x be the number Henry is thinking of.

The number is doubled and got an answer of 4.

That means:

2 · x = 4

or

2x = 4

This is the equation when Henry doubled the number and got 4 as an answer.

Solve it by dividing both sides by 2.

2x ÷ 2 = 4 ÷ 2

x = 2

The original number Henry was thinking was 2.

Cheers!

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8