Question

Which value of x makes the open sentence 4 = 5x true?

A. 0.8

B. 1.2

C. 12

D. 20

Answer 1

4= 5x
⇒ 5x= 4
⇒ x= 4/5
⇒ x= 8/10
⇒ x= 0.8

The correct answer is A. 0.8~

Answer 2

Basically, we have to solve for x to find what value makes the open sentence true.


`4 = 5x \\ \\ (4)/(5) = x \\ \\ x = (4)/(5) \\ \\ Answer: \fbox {4/5} \ or \ \fbox {0.8}`