Помогите решить уровнения.... 1)3x-1=2(x-2) 2)3(x+5)=7-5x 3)0.5x-7=-2.3x 4)6y-5.7=2.5y
1) 3х-1=2(х-2) 3х-1=2х-4 3х-2х=-4+1 х=-3 2)3(х+5)=7-5х 3х+15=7-5х 3х+5х=7-15 8х=-8 х=-1 3)0.5х-7=-2.3х 0.5х+2.3х=7 2.8х=7 х=7\2.8 х=0.25 4) 6y-5.7=2.5y 6у-2.5у=5.7 3.5у=5.7 у=5.7\3.5 у=1.6