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1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
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55+45-45+55
= 55+0+55
= 110
ung ho nha*****************
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x+35=45
=>x=45 - 35
=>x=10
32-25=7
=>x+345=7
=>x=7 - 345
=>x= -338
93 : 3= 31
=> x*2-105= (31+105) : 2
=> x= 68
kick mik nha bạn
x - 35 = 45
x = 45 + 35
x = 80
x + 345 = ( 32 - 25 )
x + 345 = 7
x = 7 - 345
x = -338
x * 2 - 105 = 93 : 3
x * 2 - 105 = 31
x * 2 = 31 + 105
x * 2 = 136
x = 136 : 2
x = 68
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( ) x 9999 x 9999 x 9999 x ... ( có 1000 số 9999 ) x 38 x 45 x 36 x 25 x 58 x 69 x 245 x 246 x 213 x 222 x 546 x 8312 x 999 x 454 x 9999 x 789 x 2563 x 0 x 25 x 24 x 23 x 26 258 x 256 256 x 256 x 24531 x 55 x ( 45 x 1 + 45 x 2 + 45 x 3 + ... + 45 x 1000 + 45 x 1001 + ... + 45 x 9999 ) = 0 nhé
/HT\
( ) x 9999 x 9999 x 9999 x ... ( có 1000 số 9999 ) x 38 x 45 x 36 x 25 x 58 x 69 x 245 x 246 x 213 x 222 x 546 x 8312 x 999 x 454 x 9999 x 789 x 2563 x 0 x 25 x 24 x 23 x 26 258 x 256 256 x 256 x 24531 x 55 x ( 45 x 1 + 45 x 2 + 45 x 3 + ... + 45 x 1000 + 45 x 1001 + ... + 45 x 9999 ) = 0
HT
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14577 x 45 = 655965
78960 x 65 = 5132400
87643 x 25 = 2191075
56567 x 15 = 848505
15 + 25 + 35 + 45 + 55 = 175
k mk , mk k lại
bằng 175 nha bn
k mk nha bn
thanks nhju