Question

Descubra o valor incognita
a) x+5=8
b) x-4=3
c) x+6=5

Answer 1

a) x + 5 = 8

x = 8 - 5
x = 3
.
.
.
b) x - 4 = 3

x = 3 + 4
x = 7
.
.
.
c) x + 6 = 5

x = 5 - 6
x = -1

Answer 2

a)
x+5=8
-5 -5
x =3

b)x-4=3
+4 +4
x=7

c)x+6=5
-6 -6
x = -1