x là 1 nha bn

x+99=-55+55

x+99=0

      x=0-99

      x=-99

x là 10

99 + 1 + 99 + 2 + 99 + 7 

= 307

k mk nha pạn

cảm ơn trước

99+1+99+2+99+7

= 307

NHA BN K MK NHA 

T H A N K   Y O U

Tổng trên bằng :

99 + 1 + 99 + 2 + 99 + 7 = 100 + 101 + 106 = 307

Đáp số : 307

\(99.2+99.7+99\)

\(=99.2+99.7+99.1\)

\(=99.\left(2+7+1\right)\)

\(=99.10\)

\(=990\)

nha To the

=99.(2+7)+99

=99.9+99

=891+ 99

=990

99.2+99.7+99

=99.2+99.7+99.1

=99.(2+7+1)

=99.10

=990

78+22+99+1+2+88=290

90

ung ho nha!!

\(78+22+99+1+2+88\)

\(=\left(78+22\right)+\left(99+1\right)+\left(2+88\right)\)

\(=100+100+100\)

\(=100.3\)

\(=300\)

\(the\\ luon\)

x+88=100-2

x+88=98

      x=98-88

      x=10

vậy x=10

x+88=200-2

x+88=98

x=98-88

x=10

x + 88 = 100 - 2

x + 88 = 98

x         = 98 - 88

x         = 10 

k mk nha

X+33=15+25

=>X+33=40

=>X=40-33

=>X=7

Vậy: X=7

x+33=15+25

x+33=40

        x=40—33  

        x=7

X+33=15+25

X+33= 40

X      = 40-33

X       = 7

Vậy x=7

Ai tích mik, mk tích lại

 nhớ nha*********

x + 100 = 200 - 300

x + 100 = -100

x = ( -100 ) - 100

x = -200.

x + 100 = 200 - 300

x + 100 = -100

          x = -100 - 100

          x = -200

k cho tớ trước

tớ k lại sau

x + 100 = 200 - 300

x + 100 = -100

x = -100 - 100

x = -200

x + 300 = 400 - 300

x + 300 = 100

x = 100 - 300

x = -200

k mk mk k lại 

x+300=400-300

x+300=100

x=100-300

x=-200

x+300=400-300

x+300=100

x=100-300

x=-200

\(x+300=400-300\)

\(x+300=100\)

              \(x=100-300\)

              \(x=-200\)

x + 100 = 200 - 300

x + 100 = - 100

x          = -100 - 100

x           = 200

 Vậy x = 200

x+100=200-300

x+100=-100

x=-100-100

x=-200

x+100=200-300

x+100=-100

x=-100-100

x=-200