(e) The number of solutions of a linear equation in 1 variable is ______.
(i) 1 (ii) 2 (iii) 0 (iv) infinite
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Step-by-step explanation:
Let the cost of one book be Rs x.
Cost of other book = Rs (x + 20)
According to the question :
=> x + 20 + x = 260
=> 2x = 260 - 20
=> x = 240/2 = 120
Therefore,
Cost of one book = Rs x = Rs 120
Cost of other book = Rs (20 + x) = Rs (20 + 120) = Rs 140
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