Question

Draw the graph of the equation 3x+4y=18. With the help of the graph find the value of y when x=2 and the value of x when y=4.5

Answer 1

Answer:

y=3 when x=2

x = 0 when y = 4.5

Step-by-step explanation:

3x + 4y = 18

x = 2

3*2 + 4y = 18

4y = 12

y =3

when y =4.5

3x + 4*4.5 = 18

3x + 18 = 18

3x = 0

x = 0

Answer 2

when x=2 then y=18-3x/4
y=18-3(2)/4
y=18-6/4
y=12/4
y=3
and when y=4.5 then x=18-4y/3
x=18-4(4.5)/3
x=18-18/3
x=0/3
x=0