Спростити вираз:a)7a-(4-11a) b) (3-4x)*(-2)-18X v) -3*(a-2b+4)-(8a-b) y)2*(11-5x+6y)-4*(5-2y+x); r)1,2*(5x-7y)+0,5*(4x-3); e)-0,35x+1,6y-(0,65-2y) u)1/3*(1,5x-1,2)-3*(1,2x+5) w)-2*(0,4a+0,5b)-3/7*(14a-21b)
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