\(77+2\times x=87\)

            \(2\times x=87-77\)

             \(2\times x=10\)

                     \(x=10:2\)

                      \(x=5\)

Vậy \(x=5\)

2xX=87-77

2xX=10

X=10:2

X=5

Tui không biết nha giúp tui làm

550 bạn nhé

\(33+33.33:33-33-33+33+77=110\)

TK MÌNH MÌNH TK LẠI

=110 NHÉ

làm sao tớ biết

ko hình nào

Phải lấy ít nhất 36 viên bi.

chắc chắn luôn

  23+77+120+100

=   100 +    220

=        320

23+77+120+100=320

\(890-90+100+100=1000\)

k mk 3 cai mk k lai cho

890-90+100+100=800+100+100

                        =900+100

                        =1000

130cm

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bị sao d