Question

Solve 101x + 99y and 99x + 101y by using elimination method?

Answer 1

Solve:99x+101y=499 ; 101x+99y+501
9 Follow 0

99x + 101y = 499 ----- (i)

101x + 99y = 501 ---- (ii)

(i) + (ii) , gives

99x + 101y + 10x + 99y= 501 + 499 = 1000

200x + 200y = 1000

200(x+y) = 1000

x + y = 1000 / 200 = 5 ----- (iii)

Now (ii) - (i) , gives

101x + 99y - 99x - 101y =501 - 499 = 2

2x - 2y = 2

2(x-y) = 2

x - y = 1 ------- (iv)

(iii) + (iv) , gives

x + y + x - y = 5 + 1 = 6

2x = 6

x = 3 and y = 2

Ans: x = 3 and y = 2

Answer 2

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IF ELSE IF LADDER:-The if else if ladder is an extension of the if else conditional branching statement. It is used when we have to check multiple conditions before taking a decision. The if else ladder provides a proper skeleton to check multiple conditions, where every condition has a block of statement within itself.

if(condition expression)

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Java Statement 1;

-----------------------

}

else if(condition expression)