решите уравнение 3) 3/4+x=1 4)x-1 1/5=4/5
5)2x-5=x-1 6) 2,7x+1,3=x+3

3/4 + х = 1х = 1 - 3/4х = 1/4----------------------х - 1  1/5 = 4/5х = 4/5 + 1  1/5х = 2--------------------------2х - 5 = х - 12х - х = 5 - 1х = 4------------------------2,7х +  1,3 = х + 32,7х - х = 3 - 1,31,7х = 1,7х = 1

3/4+х=1х=1-3/4х=1/4х-11/5=4/5х=11/5+4/5х=15/5=3