Respuesta:
4
Explicación paso a paso:
x-1=0
x=1
21 4
2.1-(1-2) +(3.1-1) -7.1+1-9
2-(-1)+16-7+1-9
2+1+16-7+1-9
19-7+1-9
12+1-9
13-9
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Verified answer
Respuesta:
4
Explicación paso a paso:
x-1=0
x=1
21 4
2.1-(1-2) +(3.1-1) -7.1+1-9
2-(-1)+16-7+1-9
2+1+16-7+1-9
19-7+1-9
12+1-9
13-9
4