ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО!!!

[tex]1.1x -2 \frac{1}{2} = \frac{3}{5} [/tex]
[tex]6.75x = 2\frac{1}{4} x - 9[/tex]
[tex]16 - 9 \frac{1}{2} y = 3y + 21[/tex]
[tex]1 \frac{1}{4} y + 7.5 = 5y[/tex]
[tex]0.5x - 7 = - \frac{2}{3} x[/tex]
[tex]6y - 2\frac{4}{5} = 2.5y[/tex]

1.1x -2 1/2=3/51.1x=0.6+2.51.1x=3.1x=3.1:1.1x=2 9/116.75x=2 1/4 x -96.75x 2.25x= -94.5x= -9x= - 216 -9 1/2 y=3y+219.5y+3y=16-2112.5y= -5y= - 5:12.5y= - 0.41 1/4 y+7.5=5y5y -1.25y=7.53.75y=7.5y=7.5:3.75y=20.5x-7= -2/3 x1/2 x+2/3 x=77/6 x=7x=7 :7/6x=7 *6/7x=66y-2 4/5=2.5y6y-2.5y=2.83.5y=2.8y=2.8:3.5y=0.8