1)5(3x-7)+2(1-x)=15x-35+2-2x=13x-33=13•1/26-33=-32,5
2)7(10-x)+3(2x-1)=70-7x+6x-3=67-x=67-(-0,048)=67,048
3)1/3(6x-3)+2/5(5x-15)=2x-1+12,5x-37,5=14,5x-38,5=14,5•3,01-38,5=5,145
4)0.01(2,2x-0,1)+0.1(x-100)=0.022x-0,001+0,1x-1=0,022•(-10)-0,001+0,1•(-10)-1=-1,221