Question

3x-2y=-3,4x+3y=47 solve by elementary methodñ​

Answer 1

Answer:

let 3x-2y=-3 be equation 1

And

4x+3y=47 be equation 2

Multiply eq. 1 by 4 and eq. 2 by 3

New equations are

12x-8y=-12---------3

12x+9y=141-----------4

Subtract eq. 4 from eq. 3

12x+9y=141

12x-8y=-12

- + +

17y=153

y=9

Putting value of y in eq. 1

3x-2y=-2

3x-18=-2

3x=16

x=16/3

Step-by-step explanation:

Answer 2

Step-by-step explanation:

3x-2y=-3.... (1)

4x+3y =47... (2)

Multiply by 3 & 2 on both equation (1) & (2) respectively

9x - 6y = - 9.....(3)

8x + 6y = 94.... (4)

Let's add (3)&(4)

9x-6y = - 9

+

8x +6y = 94

17x = 85

x=5

From equation (1)

3x-2y=-3

3×5 - 2y =-3

15 - 2y = - 3

-2y= - 3-15

y=-18/-2

y= 9

(x,y)=(5,9)

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