Odpowiedź:
a) -(-7+2x)-(8x-12)= 7-2x-8x+12 = 19-2x-8x=19-10x
b) -(5-4x)-(8+12x)= -5+4x-8-12x= -13+4x-12x=-13-8x
c) -(10x+6)-(-4x+7)= -10x-6+4x-7= -6x-6-7= -6x-13
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Odpowiedź:
a) -(-7+2x)-(8x-12)= 7-2x-8x+12 = 19-2x-8x=19-10x
b) -(5-4x)-(8+12x)= -5+4x-8-12x= -13+4x-12x=-13-8x
c) -(10x+6)-(-4x+7)= -10x-6+4x-7= -6x-6-7= -6x-13