Question

Mr. pham wrote the equation below on the board.

18-7x=-20.5

what is the value of x?

A. -5 1/2
B. -5/14
C. 5/14
D. 5 1/2

Answer 1

D. 5 1/2

Explanation:

18-7x=-20.5

Subtract 18 from each side

18-18-7x=-20.5-18

-7x = -38.5

Divide each side by -7

-7x = -38.5/-7

x =5.5

In fraction form

x = 5 1/2

Answer 2

18 - 7x = -20.5

Subtract 18 from each side:

-7x = -38.5

Divide both sides by -7:

x = -38.5 / -7

x = -5.5 = 5 1/2

The answer is D.