Question

Qual a resposta 5a-5a=
7x-5x+3x=
2y-y-10y=
4a+a-7a=
10x-13x-x=
8x-10x+4x=
8x+12x=
3a-23a=
12x+13x=

Answer 1

5a-5a= 0
7x-5x+3x= 5x
2y-y-10y=-9y
4a+a-7a=-2a
10x-13x-x=-4x
8x-10x+4x=2x
8x+12x=20x
3a-23a=-20a
12x+13x=25x