Question

Determine o valor de X:
A) (+8)-(-X)+(-3)= -5
B) (-30)-(-X)-(-70)-(-15)= -19
C) (+48)-(-36)+(-40)-(X)= -75

Answer 1

A) (+8)-(-X)+(-3)= -5

8+x-3= -5

x= -5-8+3

x= -13+3

x= -10

B) (-30)-(-X)-(-70)-(-15)= -19

-30+x+70+15= -19

x= -19-15-70-30

x= -134

C) (+48)-(-36)+(-40)-(X)= -75

48+36-40-x= -75

-x= -75+40-36-48

-x= -119

x= 119

Resposta em negrito a) x= -10 ; b) x= -134 ; c) x= 119