Question

Encontre o valor da incógnita:

a) x + 4 = 20

b) x - 2 = 12

c) 2x = 20

d) 2x + 5 = 7

e) 2x + 3 = 15

f) 2x- 4 = 3

g) 4x = 20​

Answer 1

a)x +4=20
X=20 -4
X=16

b)x-2=20
X=20+2
X=22

C)2x=20
X=20:2
X=10

D)2x+5=7
2x=7-5
2x=2
X=2:2
X=1

E)2x+3=15
2x=15-3
2x=12
X=12:2
X=6

F)2x-4=3
2x=4+3
2x=7
x=7:2
x=3,5

G)4x=20
x=20:4
x=5