Question

x + 7y = 10 ; 3x - 2y = 7 ( solve the simultaneous equations )

Answer 1

Answer:

HELLO DEAR,

x + 7y = 10------------( 1 )

3x - 2y = 7------------( 2 )

from-------( 1 ) & --------( 2 )

multiply by ---(3)* in ----( 1)

3x + 21y = 30

3x - 2y = 7

(-)___(+)__(-)

--------------------

23y = 23

Y = 1 [ put in ---( 1 ) ]

we get,

X + 7y = 10

x + 7(1) = 10

x = 10 - 7

x = 3 , y = 1

I HOPE ITS HELP YOU DEAR,

THANKS

Answer 2

Answer:

x + 7y = 10; .....(I)

3x – 2y = 7 .....(II)

Multiplying (I) with 3

3x + 21y = 30; .....(III)

3x – 2y = 7 .....(IV)

Subtracting (IV) from (III) we get

23y = 23

⇒y = 1

Putting the value of y in (IV) we get

3x – 2 = 7

⇒3x = 7 + 2 = 9

⇒3x = 9

⇒x = 3

Thus, (x, y) = (3, 1)