4х=-12; х=-12/4; х=-3
3х+14=35; 3х=35-14; 3х=21; х=21/3; х=7
2y-5+y=19; 3у=19+5; 3у=24; у=24/3; у=8
50=12-8x+4x; 50-12=-4х; 38=-4х; х=-38/4; х= -9,5
6x+5(x-2)=3x+54; 6х+5х-10=3х+54; 11х-3х=54+10; 8х=64; х=64/8; х=8
0.8t+16=4-16t; 0,8t+16t=4-16; 16,8t=-12; t=-12/16.8; t=120/168; t=5/7
9(x+1)-2=6(x-1)-2(x+3); 9х+9-2=6х-6-2х-6; 9х+7=4х-12; 9х-4х=-12-7; 5х=-19; х=-19/5; х=-3,8