Question

[(Cx2-3500)x2-2800]x2-2100=1500​

Answer 1

[(c×2-3500)×2-2800]×2-2100=1500
[(c×2-3500)×2-2800]×2=1500+2100
[(c×2-3500)×2-2800]×=3600
[(c×2-3500)×2-2800]=3600:3
[(c×2-3500)×2-2800]=1200
(c×2-3500)×2=1200+2800
(c×2-3500)×2=4000
c×2-3500=4000:2
c×2-3500=2000
c×2=3500+2000
c×2=5500
c=5500:2
c=2750
Raspuns final:2750

Answer 2

[(c×2-3500)×2-2800]×2-2100=1.500

[(c×2-3500)×2-2800]×2=1500+2100

[(c×2-3500)×2-2800]×2=3600

[(c×2-3500)×2-2800]=3600:2

[(c×2-3500)×2-2800]=1.800

(c×2-3500)×2=1800+2800

(c×2-3500)×2=4.600

(c×2-3500)=4600:2

(c×2-3500)=2.300

c×2=2300+3500

c×2=5.800

c=5800:2

c=2.900