Question

2x-3y=3 8x-9y=15 what is the solution by using substitution method?

Answer 1

Hiii friend,

2X -3Y = 3......(1)


8X -9Y = 15.......(2)


From equation 1 we get,

2X - 3Y = 3

2X = 3+3Y

X = 3+3Y/2....(3)

Putting the value of X in equation (2)

8X -9Y = 15

8 × (3+3Y/2) -9Y = 15

4(3+3Y) -9Y = 15

12 + 12Y -9Y = 15

3Y = 15-12

3Y = 3

Y = 3/3 => 1


Putting the value of Y in equation (3)

X = 3+3Y/2 => 3 + 3 × 1/2 => 6/2 => 3

Hence,

X = 3 and Y = 1


HOPE IT WILL HELP YOU..... :-)

Answer 2

hence, y=1 and x= 3

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