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solve the system of equations 9x-9y=-9 and 4x-3y=-8 by combining the equations PLEASE HELP QUICKLY!!!!!

Solve The System Of Equations 9x9y9 And 4x3y8 By Combining The Equations PLEASE HELP QUICKLY class=

Sagot :

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9x-9y=-9

x-y=-9/9

x-y+1=0.......(1)

4x-3y=-8

4x-3y+8=0....(2)

combining equation we get

(x-y+1)(4x-3y+8)=0

x(4x-3y+8)-y(4x-3y+8)+4x-3y+8=0

4x²-3xy+8x-4xy+3y²-8y+4x-3y+8=0

4x²+3y²-7xy+12x-11y+8=0 is your equation.

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