Uprość wyrażenia :
a) -2(3a-4b)-5(a+b)=
b)7(x+2y)-6(2x-y)=
c)5(x-jedna piąta y )-(2x-6y)=
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a) -2(3a-4b)-5(a+b)=-6a+8b-5a-5b=-11a+3b
b) 7(x+2y)-6(2x-y)=7x+14y-12x-6y=-5x+8y
c) 5(x-1/5y)-(2x-6y)=5x-y-2x+6y=3x+5y