Usuń nawiasy i przeprowadź redukcję wyrazów podobnych.
a)-2,4x-[-(x+1)+(1,4x-1)]
b)-[-2a-(5/8a+0,4)]-[2 i 1/2a+(1/8a-1,6)]
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a)-2,4x-[-(x+1)+(1,4-1)]=
=-2,4x+x+1+1,4x-1=0
b)-[-2a-(5/8a+0,4)-[2 1/2a+(1,8a-1,6)]=
=2a+5/8a-0,4-2 1/2a-1/8a+1,6=2a+0,625a-0,4-2,5a-0,125a+1,6=1,2