a) 0,5 + ( x - 15/2 ) : 1/2 = 9/2
<=> (x - 15/2 ): 1/2 = 9/2 - 0,5
<=> (x - 15/2) : 1/2 = 4
<=> (x - 15/2) = 4 . 1/2
<=> x - 15/2 = 2
<=> x = 2 + 15/2
<=> x = 19/2
b) 2012x - 2010x = 2014
( 2012 - 2010 ) .x = 2014
2x = 2014
x = 2014 :2
x = 1007
a) 0,5 + (x - \(\frac{15}{2}\)) : \(\frac{1}{2}\)= \(\frac{9}{2}\)
0,5 + (x - \(\frac{15}{2}\)) = \(\frac{9}{2}.\frac{1}{2}=\frac{9}{4}\)
x - \(\frac{15}{2}\)= \(\frac{9}{4}-0,5=\frac{7}{4}\)
x = \(\frac{7}{4}+\frac{15}{2}=\frac{37}{4}\)
b) 2012 . x - 2010 . x = 2014
2 . x = 2014
x = 2014 : 2 = 1007
a) 0,5 + ( x - 15/2 ) : 1/2 = 9/2
<=> (x - 15/2 ): 1/2 = 9/2 - 0,5
<=> (x - 15/2) : 1/2 = 4
<=> (x - 15/2) = 4 . 1/2
<=> x - 15/2 = 2
<=> x = 2 + 15/2
<=> x = 19/2
b) 2012x - 2010x = 2014
( 2012 - 2010 ) .x = 2014
2x = 2014
x = 2014 :2
x = 1007
Vào lúc: 2017-07-27 14:58:37 Xem câu hỏi
22/7 : ( 11 - x ) + 2/3 = 7/5
22/7 : ( 11 -x ) = 7/5 - 2/3
22/7 : ( 11 -x ) = 11/15
11-x = 22/7 : 11/15
11- x = 30/7
x = 11 - 30/7
x = 47/7