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Find a+b+c, given that x + y is not equal to -1 and

 

ax + by + c = x + 7

a + bx + cy = 2x + 6y

ay + b + cx = 3x - 1.

 May 1, 2021
 #1
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Add the equations  and we have

 

(a + b + c )x  + (a + b + c)y  + (a + b + c) =  6x + 6y +  6

 

Equating terms....(a + b + c)   =   6

 

cool cool cool

 May 1, 2021

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