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a fost răspuns

5,(x)+2,1(x)=7,4(6)
1,3(x)+1,x(3)+1,(x)=4,(6)

Răspuns :

Renatemambouko
(50+x-5)/9+(210+x-21)/90=(746-74)/90
(45+x)/9+(189+x)/90=672*90
450+10x+189+x=672
11x=33
x=3

(130+x-13)/90+(103+10x-10-x)90+(10+x-1)/9=(46-4)/9
(117+x)/90+(93+9x)90+(9+x)/9=42/9
117+x+93+9x+90+10x=420
20x=120
x=6

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