Х+3,2=1,8 4,8-х=5,6 3,7-х=-2,3 х-3,9=-2,7
X+3.2=1.8 <=> 10x+32=18 <=> 10x=18-32 <=> 10x = -14 <=> x = -1.4 (алгоритм действия) 4.8-x=5.6 <=> x = -0.8 3.7-x=-2.3 <=> x = 6 x-3.9=-2.7 <=> x = 1.2