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Question

To eliminate x from equations x+y+3x=12 ....... (1) & 8x+3y=17 ..... (2), equation (2) is to be multiplied by ..............( from the given options)

A
8
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B
12
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C
3
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D
None of the above
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Solution

The correct option is B 12
The given equations are
x+y+3x=12 ........ (1)
and 8x+3y=17 ....... (2)
Equation (i) can be further simplified as 4x+y=12
So, to eliminate x, equation (2) should be multiplied by 12.

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