Question

cost of pencil is 3 times and the cost of eraser represent this in the form of linear equation in two variables also find its four solution

Answer 1

y=3x
y=1
y=3x
1=3x
x=1/3
y=2
2=3x
x=2/3

Answer 2

let the cost of eraser be X.
then pencil cost = 3x

let the total cost be y .

y = 3x + x

y = 4x

if x = 1 , if x = 2 ,
then, then,
y = 4. y = 8