Check whether the solution exists or not, if it exists give the reason of existence and solve the system of equations. x + y + z = d
x + (1 + d)y + z = 2d
x + y + (1 + d)z = 0

x=-2

step-by-step explanation:

i began by flipping the problem to give me x= on the left (keeps it clearer for me).   so my problem simply became 10x-3=4x-6.  

1)   subtract 4x from the right side, which equals 0.   you do the same to the left of the equal as the right; therefore, subtract 4x from 10x, leaving 6x on the left.

              10x-3=4x-6   :   4x-4x on the right leaves only the -6        

2)             6x-3= 0-6 :    

                6x+3=   -6

3) divide

the answer is 1,118,210 lol