2014*a+2014*79=201400
2014*(a+79)=201400
a+79=201400:2014
a+79=100
a=100-79
a=21
nho yick cho minh nhé
2014 x a + 2014 x 79 = 201400
2014 x a + 159106 = 201400
2014 x a = 201400 - 159106
2014 x a = 42294
a = 42294 : 2014
a = 21
2014 x a + 2014 x 79 = 201400
2014 x ( a + 79 ) = 201400
a + 79 = 201400 : 2014
a + 79 = 100
a = 100 - 79
a = 21
2014 x a + 2014 x 79 = 201400
2014 x a = 201400 - (2014 x 79)
2014 x a = 201400 - 159106
2014 x a = 42294
a = 42294 : 2014
a = 21
ta có:2014Xa+2014X79=201400
=>2014Xa+159106=201400
=>2014Xa=201400-159106
=>2014Xa=42294
=>a=42294:2014=21
Vậy a=21
2014x a+ 2014x 79= 201400
2014x (a+ 79)= 201400
a+ 79= 201400: 2014
a+ 79= 100
a = 100- 79
a = 21