Question

if x+2y=1, 2x-3y=12 find the value of d​

Answer 1

Answer:

x+2y=1 ====> x+2y-1=0 .......(1)

2x-3y=21 =====> 2x-3y-21=0 .........(2)

Step-by-step explanation:

• multiply equation (1) with ×2

therefore {x+2y-1 ..... (1)} ×2 ----->

=2x+4y-2=0..... (3)

• subtract eqs. (3) from (2)

2x-3y-21=0

- 2x-4y-2=0

- + +

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

y-19=0

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therefore #y=19#

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if 2x-4y-2=0

2x-4 (19)-2=0

2x-76-2=0

2x-78=0

2x=78

x=78

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2

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#x=39#

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