Question

For two equations

3x+ 2 y =81 ....... (1)

7x+ 9y =267 ....... (2)

By which numbers are equation (1) and equation (2) multiplied to eliminate x.
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Answer 1

Step-by-step explanation:

1st Eqaution Solution

3x+2y=81

3x+2y=5xy

So, Now the eqaution is - 5xy= 81

Now Both side divided By 5

5xy÷5 =xy , 81÷5=16.2

So , xy = 16.2

so x= 16.2 ÷2 = 8.1

Final Answer - X= 8.1 Y = 8.1

2nd Eqaution Solution

7x+9y=267

Same Process As Above

7+9=16xy

New Eqaution- 16xy = 267

Both Side Divided by 16

16xy÷16 = xy ; 267÷16 = 16.6875

Xy = 16.6875

Now X = 16.6875÷2 = 8.34375

Final Answer - X = 8.34375 ; Y = 8.34375

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