Question

To draw a graph of 4x + 5y = 19, find y when x = 1.

Answer 1

The given equation,

4x + 5y = 19  ......(i)

x = 1

Substituting the value of x in equation (i), we get

4 × (1) + 5y = 19

∴ 4 + 5y = 19

∴ 5y = 19 – 4

∴ 5y = 15

∴ `"y" = 15/5`

∴ y = 3