Question

8x-3y=12 and 5x -2y= 7 by substituting method​

Answer 1

Step-by-step explanation:

8X-3Y =12

or 8X = 12+3Y

or, X = (12+ 3Y)/8

put the value of X in the equation 5X-2Y=7

5×(12+3Y)/8 - 2y = 7

or ,{ 5(12+3Y) -16Y}/8 =7

or. 60 + 15Y -16Y = 56

or, -1Y= 56-60

or -Y = -4. or Y =4

put the Y value in the equation 8X-3Y= 12

or ,. 8X - 3×4 = 12

or. 8X -12 =12

or, 8X = 12+12

or, 8X = 24

or X =3

the value of the X= 3, Y= 4