Question

Ajutati-ma va rog!!!!!!!!!!!!!!!
Dau coronita!

Answer 1

a-b=2,5
a=3/2⇒3/2-b=25/10⇒3/2-b=5/2⇒b=3/2-5/2⇒b=-2/2⇒b=-1
a=b=3/2-1=3/2-2/2=1/2
b+c=-1-2/10=-1-1/5=-5/5-1/5=-6/5
a-(b+c)=3/2-(-6/5)=3/2+6/5=15/10+12/10=27/10
-a+(b+c)=-3/2+(-6/5)=-3/2-6/5=-15/10-12/10=-27/10
a doua linie
b+c=12.5 = 125/10=25/2
b=-1.(3) = -12/9=-4/3⇒-4/3+c=25/2⇒c=25/2+4/3⇒c=75/6+8/6⇒c=83/6⇒
c=21/2⇒c=10.5
a-(b+c)=41.7
b+c=12.5⇒a=41.7+12.5⇒a=54.2
a+b=54.2+(-4/3)=542/10-4/3=271/5-4/3=813/15-20/15=793/15=52.8(6)
a-b=271/5+4/3=813/15+20/3=833/15=55.5(3)
-a+(b+c)=-54.2+12.5=-41.7
a treia linie
a-b=15/2
a=32/3⇒32/3-b=15/2⇒b=32/3-15/2⇒b=62/6-45/6=19/6
-a+(b+c) = -13.2⇒b+c=a-13.2=32/3-132/10=32/3-66/5=156/15-198/15=42/15=2.8
b+c=2.8
b=19/6⇒19/6+c=28/10⇒c=14/5-19/6⇒c=84/30-95/30=11/30
a+b=32/3+19/6=64/6+19/6=83/6=21/2=10.5
a-(b+c)=32/3+28/10=32/3+14/5=160/15+42/15=202/15