Question

12-13-14-15-16-17-18-19=1+x

tìm x

 

 

 

đêm nay mình cần gấp

Answer 1

12-13-14-15-16-17-18-19=1+x

(-1)-14-15-16-17-18-19=1+x

(-15)-15-16-17-18-19=1+x

(-30)-16-17-18-19=1+x

(-46)-17-18-19=1+x

(-63)-18-19=1+x

(-63)-(18+19)=1+x

(-63)-37=1+x

(-100)=1+x

              x= (-100)-1

              x=-101

Answer 2

Trl:

\(12-13-14-15-16-17-18-19=1+x\)

\(\Rightarrow-1-13-14-15-16-17-18-19=1+x\)

\(\Rightarrow-15-15-16-17-18-19=1+x\)

\(\Rightarrow-30-16-17-18-19=1+x\)

\(\Rightarrow-46-17-18-19=1+x\)

\(\Rightarrow-63-18-19=1+x\)

\(\Rightarrow-81-19=1-x\)

\(\Rightarrow-100=1+x\)

\(\Rightarrow x=-100-1\)

\(\Rightarrow x=-101\)