substitute 9x-4y=200 / 7x-3y=200

1.	substitute 9x-4y=200 / 7x-3y=200
Answer» Value of y is 16Value of x is 264/9 9x-4y=200. ......(1)7x-3y=200. ......(2)Take eq (2)7x-3y=2007x=200+3yx=200+3y/7. ....(3)Put eq(3) in eq(1)9(200+3y/7)-4y=2001800+27y-4y=20071800+23y=140023y=1400-180023y= -400y=-400/23Put the value of y in eq 27x-3(-400/23)=2007x+1200=200237x+1200=46007x=4600-12007x=3400x=3400/7

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