1.Doprowadz do najprostszej postaci a) 7(5a-b)-3(2a-3b)= b) 4x(y-3)+5y(3-10x)+(2x+5)(6-3y)=     2.Rozwiaz nierownosc   x-5 2x- 10> x - 6   3.Rozwiaz rownania a) x+2(x-1)=4x-7(x-1)     b) 3(2x-15)- 4x-5=3x-11 5

1. a) 35a-7b-6a-9b=29a-16b b)4xy-12x+15y-50xy+12x-6xy+30-15y=40xy+15y+30   2. co to jest to x-5?? 2x-10>x-6 2x-x>10-6 x>4   3. a)x+2x-2=4x-7x-7 x+2x+7x-4x=2-7 10x=5 x=5:10 x=jedna druga b)6x-45-4x-5=3x-11 6x-4x-3x=5-11+45 -x=51 x=-51   Prosze;)

zad1 a)7(5a-b)-3(2a-3b)=35a-7b-6a+9b=29a+2b b)4x(y-3)+5y(3-10x)+(2x+5)(6-3y)=4xy-12+15y-50xy+12x-15y=-46xy-12 zad2   x-5 2x- 10> x - 6 2*5-10>5-6=10-10>-1=0>-1 zad3 a) x+2(x-1)=4x-7(x-1)=x+2x-2=4x-7x+7=3x-2=-3x+7=5 3(2x-15)- 4x-5=3x-11 5 (2x-15)- 4x-5=3x-11=(2*5-15)-4*5=3*5-11=(10-15)-20=15-11=-5-20=4-25=4