Answer:
C
Step-by-step explanation:
To sum matrices they have to be of the same proportions
and we sum the corresponding
so we have
[tex]1)-3x_1+7=10\\\\-3x_1=3\\\\x_1=-1\\\\\\2)-3x_2+0=0\\\\-3x_2=0\\\\x_2=0\\\\\\3)-3x_3-1=8\\\\-3x_3=9\\\\x_3=-3\\\\\\4)-3x_4+2=-19\\\\-3x_4=-21\\\\x_4=7\\\\\\5)-3x_5-3=-18\\\\-3x_5=-15\\\\x_5=5\\\\\\6)-3x_6+4=10\\\\-3x_6=6\\\\x_6=-2[/tex]
so the answer is C
I cannot write a matrix but there you have the values
x_1 x_2 x_3
x_4 x_5 x_6
