Question

i) The cost of a table is ₹440 more than the cost of a chair
a) Express the above statement as a linear equation in two variables x and y
b) If the cost of the table is ₹ 800 find the cost of 2 chairs

Answer 1

Answer:

a) x - y - 440 = 0  & b) ₹720

Step-by-step explanation:

a)

Let 'x' and 'y' represent table and chair respectively

A.T.Q,

x = 440 + y

or, x - y - 440 = 0

or, x - y - 440 = 0-------(i)

∴x - y - 440 = 0 is the required linear equation

[Note: Linear equation means an equation whose degree of power is 1]

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b)

From eq(i),

x - y - 440 = 0

Put x = 800,

or, 800 - y - 440 = 0

or, 360 = y

∴y = 360

∴2y = 2 *360 =720

∴ The cost of 2 chairs is ₹720