Question

5) Resolva as equações: x+5 = 8 x-4 = 3 x+6 = 5 x-7 = -7 x+9 = -1 x+28 = 11 10 = x+8 15 = x+20 4 = x-10 7 = x+8

Answer 1

x+5=8

x=8-5

x3

x-4=3

x=3+4

x=7

x+6=5

x=5-6

x=-1

x-7=-7

x=-7+7

x=0

x+9=-1

x=-1-9

x=10

x+28=11

x=11-28

x=-17

10=x+8

x=8-10

x=-2

15=x+20

x=20-15

x=5

4=x-10

x=-10-4

x=+14

7=x+8

x=8-7

x=1