Помогите с матешей!#1269(а,б,в,г)

а)3(3х-1)+5=8(х+2)+39х-3+5=8х+16+39х-8х=16+3-2х=17б)-5(у-7)=30-(2у+1)-5у+35=30-2у-1-5у+2у=30-1-35-3у=-6у=-6:(-3)у=2в)-4.5(х+3)-1=7.2-5(х-2)-4.5х-13.5-1=7.2-5х+10-4.5х+5х=7.2+10+13.5+10.5х=31.7х=31.7:0.5х=63.4г)3(2.4t-3.5)+6=9.7t-37.2t-10.5+6=9.7t-37.2t-9.7t=-3+10.5-6-2.5t=1.5t=1.5:(-2.5)t=-0.6

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