Решите уравнение: 1) 2х+7=х+5,5; 2) 9,5х+2=5,7х-5,6 3) 2,9х+7,4=х+1,7
2х+7=х+5,5 2х-х=5,5-7 1х=-1,5 х=-1.5:1 х=1.5 ________ 9.5х+2=5,7х-5.6 9.5х-5.7х=-5.6-2 3.8х=-7.6 х=-7.6:3.8 х=-2 _______ 2.9х+7.4=Х+1.7 2.9х-х=1.7-7.4 1.9х=-5.7 х=-5.7:1.9 х=-3 ------------------------
1)x=-1.5 2)x=-2 3)x=-3