Question

What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3? y = 5 y = 6 y = 8 y = 9

Answer 1

9

Explanation:

6.4x + 2.8y = 44.4

x=3, substituting it in the expression above we have :

6.4(3) + 2.8y = 44.4

19.2 + 2.8y = 44.4

2.8y = 44.4 -19.2 = 25.2

y = 25.2 / 2.8 = 9

Answer 2

y=9

Explanation:

6.4x + 2.8y = 44.4

x=3, y=?

• 6.4*3+2.8y= 44.4
• 2.8y= 44.4- 19.2
• 2.8y= 25.2
• y= 25.2/2.8
• y= 9