Question

Resolva as seguintes equações:
b) 83=2−9
c) 2+3=+73
d) 2−34−13=−+22

Answer 1

b) 83=2-9
83-2+9
81+9
R=90
C) 2+3=73
2+3-73
5-73
R= -68
C) 2-34-13=+22
2-34-13-22
2-69
R= -67