2(х+5)-3(х-2)=10; 2(5-х)-5(2х-3)=1
2(x+5)-3(x-2)=10 2x+10-3x+6=10 -x=10-10-6 x=6 2(5-x)-5(2x-3)=1 10-2x-10x+15=1 -2x-10x=1-10-15 -12x=-24 x=2