Question

What is the value of y in the equation 5x + 2y = 20, when x = 0.3?

2.5
2.8
9.25
10.75

Answer 1

Explanation:

5×0.3+2y=20

5×0.3= 1.5

1.5+2y=20

1.5+2y÷2=20÷2

1.5y=10

y=0.15

Answer 2

y= 9.25

Explanation:

5x + 2y = 20

2y = 20 - 5(0.3)

2y = 20 - 1.5

y = 20/2 - 1.5/2

y = 10 - 0.75

y = 9.25