matematyka z plusem 1 gimnazjum str 210 zad 47 wyznacz wskazane wielkości a) k=7n;       n b) a=k+6 ;      k c) z=7-y;          y d) d=a+bc;     c e) x=2k+1;     k f) 2k=7n+5;     n

a) [latex]k=7n /:7[/latex] [latex]n= frac{k}{7} [/latex] b) [latex]a=k+6[/latex] [latex]k=a-6[/latex] c) [latex]z=7-y[/latex] [latex]y=7-z[/latex] d) [latex]d=a+bc[/latex] [latex]bc=d-a /:b[/latex] [latex]c= frac{d-a}{b} [/latex] e) [latex]x=2k+1[/latex] [latex]2k=x-1 /:2[/latex] [latex]k= frac{x-1}{2} [/latex] f) [latex]2k=7n+5[/latex] [latex]7n=2k-5 /:7[/latex] [latex]n= frac{2k-5}{7}[/latex]