Question

indique as solução das equações
A)72=48+X B)128+X=900 C) x -8=10 D)7x-1=13

Answer 1

a) 72=48+x
72-48=x
x=24
S={24}
b) 128+x=900
x=900-128
x=772
S={772}
c) x-8=10
x=10+8
x=18
S={18}
d) 7x-1=13
7x=13+1
7x=14
x=14/7
x=2
S={2}