5/13 = X+4/52X-3/17=24/51Спасибо)

[latex]\frac{5}{13}=X+\frac{4}{52} [/latex]   [latex]X=\frac{5}{13}-\frac{4}{52}=\frac{20-4}{52}=\frac{16}{52}=\frac{4}{13}[/latex]     [latex]X-\frac{3}{17}=\frac{24}{51} [/latex]   [latex]X=\frac{24}{51}+\frac{3}{17}=\frac{24+9}{51}=\frac{33}{51}[/latex]  

[latex]\frac{5}{13}=x+\frac{4}{52}[/latex] [latex]\frac{5}{13}=x+\frac{1}{13}[/latex] [latex]\frac{5}{13}=\frac{13x+1}{13}[/latex] [latex]13x+1=\frac{13*5}{13}[/latex] [latex]13x+1=5[/latex] [latex]13x=5-1[/latex] [latex]13x=4[/latex] [latex]x=\frac{4}{13}[/latex]   ------------------   [latex]x-\frac{3}{17}=\frac{24}{51}[/latex] [latex]\frac{17x-3}{17}=\frac{8}{17}[/latex] [latex]17x-3=8[/latex] [latex]17x=8+3[/latex] [latex]17x=11[/latex] [latex]x=\frac{11}{17}[/latex]