Восстанови пропущенные скобки. 40 - 8 + 7 = 25 50 - 9 - 6 = 47 86-30- 10 = 66 42 - 20 + 2 = 20

c3h6cl2+2koh=ch3ch2coh+2kcl+h2o

3ch3ch2cooh+k2cr2o7+4h2so4=3ch3ch2cooh+k2so4+cr2(so4)3+4h2o

ch3ch2cooh+cl2=ch3ch(cl)cooh+hcl

ch3ch(cl)cooh+nahco3=ch3ch(cl)coona+h2o+co2

ch3ch(cl)coona+ch3ch2br=ch3ch(cl)cooch2ch3+nabr 

вроде так