Răspuns :
[tex]3(7-4x)=5[/tex]
[tex]7-4x=\frac{5}{3}[/tex]
[tex]4x=7-\frac{5}{3}[/tex]
[tex]4x=\frac{16}{3}[/tex]
[tex]x=\frac{\frac{16}{3}}{4}=\frac{16}{12}=\frac{4}{3}[/tex]
[tex]7-4x=\frac{5}{3}[/tex]
[tex]4x=7-\frac{5}{3}[/tex]
[tex]4x=\frac{16}{3}[/tex]
[tex]x=\frac{\frac{16}{3}}{4}=\frac{16}{12}=\frac{4}{3}[/tex]
3(7-4x )=5
21-12x =5
12x =21-5
12x =16
x =16/12 =4/3
verif ; 21-12*4/3 =21-48/3 =21-16 =5
21-12x =5
12x =21-5
12x =16
x =16/12 =4/3
verif ; 21-12*4/3 =21-48/3 =21-16 =5