Survive 2020

this is really a simple question... I promise this time..

MATH REEEEEEEEEEE

OK... I KNOW YOU GUYS ARE EXCITED=ME TOOOO AYYYY

This is easy... pls answer

1)K+(k+2)+(k+4)=84
2)2(-1/3a)>12
3)(-b+1/b)<1/2
4)formulae: x/a+y/b=1
Change to form y=mx+c
3x+6y/18=1 to y=mx+c



I think everyone knows this
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