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(1,257xa+1,743xa)-2008=2009
1,257xa+1,743xa =2009 + 2008
1,257xa+1,743xa = 4017
(1,257+1,743) x a = 4017
3 x a = 4017
a = 1339
Chúc bạn học tốt! (^ _ ^)
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\(\left(1,256.a+1,743.a\right)-2014=2015\)
\(\Leftrightarrow a\left(1,256+1,743\right)=2015+2014\)
\(\Leftrightarrow a.2,999=4029\)
\(\Leftrightarrow a=\frac{4029}{2,999}=1343,\left(44781593\right)\)
\(\left(1,256.a+1,743.a\right)-2014=2015\)
\(=\left(1,256.a+1,743.a\right)=2015+2014=4029\)
\(=\left(1,256.a+1,743.a\right)=4029\)
\(=\)gộp lại rùi tính
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
A = 2009 - x : 2 x 2008
\(\Rightarrow\) 1 = 2009 - x : 2 x 2008
2009 - x : 2 x 2008 = 1
x : 2 x 2008 = 2009 - 1
x : 2 x 2008 = 2008
x : 2 = 2008 : 2008
x : 2 = 1
x = 1 x 2
x = 2
![](https://rs.olm.vn/images/avt/0.png?1311)
1,257*a+1,743*a=4017
(1,257+1,743)*a=4017
3*a=4017
a=4017/3
a=1339