Question

5-resolva as equações do 1°

A)x+5=15
B)×+7=12
C)2×+8=20
D)2×+6=18+×​

Answer 1

a) x + 5 = 15

x = 15 - 5

x = 10

b) x + 7 = 12

x = 12 - 7

x = 5

c) 2x + 8 = 20

2x = 20 - 8

2x = 12

x = 12 ÷ 2

x = 6

d) 2x + 6 = 18 + x

2x - x = 18 - 6

x = 12

Answer 2

A) x= 15-5

x=10

B) x=12-7

x= 5

C) 2x= 20-8

2x= 12

x= 12÷2

x= 6

D) 2x-x= 18-6

x= 12

espero ter ajudado :)