Question

cost of a pen is two and half times the cost of a pencil
q1) explain this situation as a linear equation in two variables cost of a pen is rs x and cost of a pencil is rs y

a) X=y
b)2x + 5y = 0
c)2x - 5y = 0
d)X+y =0

q2) find the cost of pen if pen If Cost of pencil is rs 2

a)rs 2
b)rs 5
c)rs 10
d)rs 2.50
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Answer 1

Answer:

a) 2x-5y=0→linear equation

b) 2x-5y=0

2x-5(2)=0

2x-10=0

x=5