Resposta :
Resposta:C=5X/7+100/7
Explicação:
C-0/100-0=X-(-20)/120-(-20)
C/100=X+20/120+20
C/100=X+20/140
100.(X+20)
100X+2000=140C
C=100X/140+2000/140:20/20
C=5X/7+100/7
Resposta:C=5X/7+100/7
Explicação:
C-0/100-0=X-(-20)/120-(-20)
C/100=X+20/120+20
C/100=X+20/140
100.(X+20)
100X+2000=140C
C=100X/140+2000/140:20/20
C=5X/7+100/7