Q3 of 71 Page 68

Solve the following pair of equations by the method of elimination:



Using elimination method:


Multiply (i) by 4 and (ii) by 5,




Subtract (iii) from (iv),





⇒ x = 2


Putting this value of x in (i),






More from this chapter

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1

Obtain a pair of linear equations from the following information:

"The rate of tea per kg is seven times the rate of sugar per kg. The total cost of 2 kg tea and 5 kg sugar is Rs. 570."

 2

Draw the graphs of the pair of linear equations in two variables. x + 3y = 6, 2x — y = 5. Find its solution set.

 4

Solve the following pair of linear equations by the method of cross – multiplication:

(a + b)x + (a — b)y = a2 + 2ab — b2, a ≠ b


(a — b) (x + y) = a2 — b2, a ≠ b

 5

Solve the following pair of equations:

and x ≠ 1, y ≠ 2