Question

Solve : x + y = 7, 2x – 3y = 9.​

Answer 1

Answer:

2x+2y=7

2x-3y=9

then,

y=2

x=5

by elimination method

Answer 2

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➡Given here .

♠ X + Y = 7 ..........(1)

♠ 2X - 3Y = 9.........(2).

[ Multiply by 2 in (1) ]

↪2X + 2Y = 14 .........(3)

↪2X -3Y = 9...............(4)

[ Subtract (3)-(4) ].

➡We get,

=>5y = 5

=>5y = 5

=>Y = 1.

➡Keep y=1, in (1) .

=> X + 1 = 7

=> X + 1 = 7

=>X = 6.

➡Thus:-

♠ Value of X= 6.

♠Values of Y = 1.

➡Satisfies Answer :-

↪We finds here ,

♠ x = 6

♠Y = 1,

[ Keep values in equations (1) ]

=> 1+6 =7

=> 7=7

➡Thats proved

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