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10000000000000000000000000000000000+20000000000000 = 100000000000000000000020000000000000
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x + 2 + x + 4 + x + 6 + ..... + x + 100 = 2700
50x + 2 + 4 + 6 + ..... + 100 = 2700
50x + (100 + 2) x 50 : 2 = 2700
50x + 2550 = 2700
50x = 2700 - 2550 = 150
x = 150 : 50 = 3
x + 2 + x + 4 + x + 6 + ... + x + 100 = 2700
50x + 2 + 4 + 6 + .... + 100 = 2700
50x + ( 100 + 2 ) x 50 : 2 = 2700
50x + 2550 = 2700
50x = 2700 - 2550 = 150
x = 150 : 50 = 3
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a (X:10)+37=60
X:10=23
X=2,3
b 25xX-15xX=72
X(x25-15)=72
Xx10=72
X=7,2
c 138-(Xx5)=38
Xx5=100
X=20
d (Xx9):52=18
Xx9=936
X=104
e 52xX+48xX=100
Xx(52+48)=100
Xx100=100
X=1
f 623xX-123xX=1000
Xx(623-123)=1000
Xx500=1000
X=2
g Xx16+84xX=700
Xx(16+84)=700
Xx100=700
X=7
h 236xX-Xx36=2000
Xx(236-26)=2000
Xx200=2000
X=10
i 216:X+34:X=10
(216+34):X=10
250:X=10
X=25
f 2125:X-125:X=100
(2125-125):X=100
2000:X=100
X=20
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b. \(\dfrac{4.2.3.5.2.6.2.5.3}{4.3.4.5.6.4.5.6}=\dfrac{1}{4}\)
c. \(\dfrac{17.2.101.2005}{17.2.101.2.2005}=\dfrac{1}{2}\)
d. \(\dfrac{2.3.4.2.11.13.17}{3.11.4.4.17.13.2}=\dfrac{1}{2}\)
a)\(\dfrac{4\times6\times10\times12\times15}{4\times12\times5\times24\times30}=\dfrac{2}{2\times2\times2}=\dfrac{2}{8}=\dfrac{1}{4}\)
b)\(\dfrac{34\times101\times2005}{17\times202\times4010}=\dfrac{2}{2\times2}=\dfrac{2}{4}=\dfrac{1}{2}\)
c)\(\dfrac{6\times8\times11\times13\times17}{33\times16\times17\times26}=\dfrac{6}{3\times2\times2}=\dfrac{1}{2}\)