Question

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

Answer 1

First of all, let's plug the value for x:

`5x + 2y =20 \to 5\cdot 0.3+ 2y =20 \to 1.5+ 2y =20`

Now subtract 1.5 from both sides:

`2y = 20-1.5 = 18.5`

Finally, we divide both sides by 2:

`y = (18.5)/(2)`

Answer 2

5x + 2y = 20

5(0.3) + 2y = 20

1.5 + 2y = 20

- 1.5 - 1.5

2y = 18.5

2 2

y = 9.25

The value of y is 9.25.

(x, y) = (0.3, 9.25)