Question

What is the value of x in the equation 1/5x –2/3 y = 30, when y = 15?

A.4
B. 8
C. 80
D. 200

Answer 1

Plug y= 15 in the equation 1/5x -2/3y= 30, we have:
1/5x -2/3* 15= 30
⇒ 1/5x -10= 30
⇒ 1/5x= 30+ 10
⇒ 1/5x= 40
⇒ x= 40/ (1/5)
⇒ x= 40* (5/1)
⇒ x= 200

Final answer: D. 200~