- ..2x-3=5 1/4................5

[latex]- \frac{2x-3}{5} = 5 \frac{1}{4} \\ \\ - \frac{2x-3}{5} = \frac{21}{4} \\ \\ -4(2x-3) = 21*5 \\ \\ - 8x +12 =105 \\ \\ -8x= 105-12 \\ \\ -8x= 93 \\ \\ x=93: (-8) \\ \\ x= -11.625 [/latex] Проверим: [latex]- \frac{2* (-11,625) -3}{5} = 5 \frac{1}{4} \\ \\ - \frac{-26,25}{5} = 5 \frac{1}{4} \\ \\ - ( -5,25) = 5 \frac{1}{4} \\ \\ 5,25=5,25[/latex]