a)x=3236.32

b)x=52.3

a)x:100=9,04 x 3,58

x:100=32,3632

x=32,3632 x 100

x=3236,32

b)98-x=255,92:5,6

98-x=45,7

x=98-45,7

x=52,3

a)  X = 0,323632

b) X = 52,3

98 – x = 255,92 : 5,6

98 – x = 45,7

x =  98 –  45,7

x =   52,3    

98 – x = 255,92 : 5,6

98 – x = 45,7

 x =  98 –  45,7

 x =   52,3    

98 – x = 255,92 : 5,6

98 – x = 45,7

   x =  98 –  45,7

   x =   52,3    

x : 100 = 9,5 x 3, 58 

x : 100 = 34,01

x : 100 = 34,01 x 100

x  =  3401

x : 100 = 9,5 x 3, 58 

x : 100 = 34,01

x : 100 = 34,01 x 100

x  =  3401

x : 100 = 9,5 x 3, 58

x : 100 = 34,01

x : 100 = 34,01 x 100

   x  =  3401

a) 100 - 7 . (x - 5) = 58

7. (x - 5) = 100 - 58

7. (x - 5) = 42

x - 5 = 42 : 7

x - 5 = 6

x = 6 + 5 

x = 11

b)\(x+\frac{1}{3}=\frac{7}{26}.\frac{13}{6}\)

\(x+\frac{1}{3}=\frac{7}{12}\)
\(x=\frac{7}{12}-\frac{1}{3}\)

\(x=\frac{3}{12}=\frac{1}{4}\)

Thiếu câu c) bạn ơi!

ok trả lời liền

\(\left(100+58\right)\times58+\left(200-42\right)\times12\)

\(=158\times58+158\times12\)

\(=158\times\left(58+12\right)\)

\(=158\times70=11060\)

\(128\times72+14\times256\)

\(=128\times72+14\times2\times128\)

\(=128\times\left(72+28\right)\)

\(=128\times100=12800\)

\(157\times99+123+34\)

\(=157\times99+157\times1\)

\(=157\times\left(99+1\right)\)

\(=157\times100=15700\)

\(67+98\times45+23\)

\(=98\times45+90\)

\(=98\times45+45\times2\)

\(=45\times\left(98+2\right)\)

\(=45\times100=4500\)