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find the value of x and y: 5x+7y=50 7x+5y=46

Posted by Maisha Singh 6 years, 10 months ago

CBSE > Class 10 > Mathematics

5 answers

Ram Kushwah 6 years, 10 months ago

Mr Mishra don't worry here is the solution:

5x+7y=50...(1)

7x+5y=46....(2)

Multiply (1) by 7 and (2) by 5 we get

35x+49y=350.....(3)

35x+25y=230.......(4)

subtract (4) from (3)

24y=120 , y=5

Now from(1)

5x+7*5=50

5x=15

x=3, y=5

1Thank You

Harshdeep Singh 6 years, 10 months ago

Sorry x=3

0Thank You

Harshdeep Singh 6 years, 10 months ago

5x × 7y=50 ---(×7) =35x ×49y=350 --(1) 7x ×5y=46 ---(×5) = 35x ×25y=230 ---(2) Solving (1)&(2) Y=5 X=15

0Thank You

Maisha Singh 6 years, 10 months ago

plz can u give me the full explanation and not just values.. Like can u give its complete solution by any of the three methods..plz

0Thank You

Abhay Pandey 6 years, 10 months ago

X is equal to 3 Y is equal to 5

0Thank You

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CBSE > Class 10 > Mathematics