Question

Solve 8x + 3y = 11 ; 3x – y = 2

Answer 1

8x+3y=11---1
3x-y=2----2
by elimination method
x=1
and sub in 1
8x+3y=11
8 (1)+3y=11
8+3y=11
3y=11-8
3y=3
y=1

Answer 2

Answer:

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Step-by-step explanation:

Hello friends..

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==> 8x + 3y = 11 ....................(I)

==> 3x - y = 2 ...................(II)

In equation (II) it is easy to express y in terms of x.

3x - y = 2

3x -2 = y

Substituting y = 3x - 2 in equation (I)

8x + 3y = 11

8x + 3(3x - 2) = 11

8x + 9x - 6 = 11

17x - 6 = 11

17x = 11+6

17x = 17

x = 17/17

x = 1

Now,substituting the value of x in the equation y = 3x - 2

y = 3x - 2

y = 3 x 1 - 2

y = 3 - 2

y = 1

So,x = 1 and y = 1 are the solution of the given equation..

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