Question

Calcule:
a) x − 18 = 45 c) x − 78 = −78
b) x − 12 = 30 d) x − 34 = 40

Answer 1

a) x+18=45

x=45-18

x=27

b) x-12=30

x=30+12

x=42

c) x-78=-78

x=-78+78

x=0

d) x-43=40

x=40+43

x=83

Espero ter ajudado