Question

draw the graph of the equation 3x+4y-21=0​

Answer 1

3x+4y-21=0

let x = 1

(3 X 1 )+4y-21=0

3+4y-21=0

3+4y=21

4y=21-3

4y=18

y=18/4

y=4.5

x=1,y=4.5 ----- ( i ).

now ,

let y=1.5

3x+4y-21=0

3x+ (4X1.5) -21 =0

3x+6-21=0

3x-15=0

3x=15

x=15/3

x=5.

x=5,y=1.5 ----- ( i ).

now you can put these co-ordinate in the graph.