Answer:
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Step-by-step explanation:
hdhdbdydHdudhd gs5vdsv gsydBsy gs6eg gSVsybzys. gsyeB gsvsysBy gsvsysBy gzhbsus gs6beys gangs gsvsysBy gsgVs
Brian will have done 445, and Christian will have done 425.
x=-5, y=-1
Substitute x=-4+y into -2x-5y=15. So we have
-2(-4+y)-5y=15
8-2y-5y=15
-7y=7
y=-1
And x is -4+y so x= -4+(-1)= -5.