Respuesta:
A. x+2=7 = x=7-2=5 = 5+2=7
B. x-4=3 = x=3+4=7 = 7-4=3
C. 3+x=8 = x=8-3=5 = 3+5=8
D. 2x=12 = x=12÷2=6 = 2(6)=12
E. No lo entendí, zorry
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Respuesta:
A. x+2=7 = x=7-2=5 = 5+2=7
B. x-4=3 = x=3+4=7 = 7-4=3
C. 3+x=8 = x=8-3=5 = 3+5=8
D. 2x=12 = x=12÷2=6 = 2(6)=12
E. No lo entendí, zorry