помогите решить уравнение дам 70 баллов
1)2(2,6х-4)= -30+5,09х
2) 20,1х-1,1=4(10-5,25х)
3)3(17-22,1х)= -7-63,4х
4)19х-0,4=2(32х-5)+0,6
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