пожалуйста помогите решить уравнения.
2,136: ( 1,9-х ) = 7,12
4,2 * ( 0,8 + у ) = 8,82
0,2t +1.7t - 0.54 = 0.22
5.66z - 2z - 0.7z + 2.65 = 7

2,136:(1.9-х)=7.121.9-х=2.136:7.121.9-х=0.3х=1.9-0.3х=1.64.2*(0.8+у)=8.820.8+у=8,82:4.20.8+у=2.1у=2.1-0.8у=1.30.2t+1.7t=0.22+0.541.9t=0.76t=0.45.66z-2z-0.7z+2.65=72.96z=7-2.652.96z=4.35