Question

encontre os valores desconhecidos das equações do 1° grau: A)×+28=45 B)×+12=25 C)-4+ ×=18 D)×-10=20 E) 2× =18 F) 40= 4× G) 6×+11=41 H) 8-2×=-8 i) 5×+5=20

Answer 1

Resposta:

x=45-28

x=17

x=25-12

x=13

(-4)+x=18

x=18-4

x=14

x-10=20

x=20+10

x=30

2x=18

x=18/2

x=9

40=4x

4x=40

x=40/4

x=10

6x+11=41

6x=41-11

6x=30

x=30/6

x=5

8-2x=-8

-2x=-8-8

-2x=16

x=16/2

x=8

5x+5=20

5x=20-5

5x=15

x=3