Question

resolva as equações:

a)-x=9

b)-x=-2

c)-7x=14

d)-3x=10

e)-5x=-18

f)-4x=8

g)-3x=-9

h)-5x=15

i)-2=-10

j)15=-3x

k)-40=-5x​

Answer 1

a) -x = 9 × (-1)

x = -9

b) -x = -2 × (-1)

x = 2

c) -x = 14 ÷ 7

-x = 2 × (-1)

x = -2

d) -x = 10 ÷ 3

-x = 3,333... × (-1)

x = -3,333...

e) -x = -18 ÷ 5

-x = -3,6 × (-1)

x = 3,6

f) -x = 8 ÷ 4

-x = 2 × (-1)

x = -2

g) -x = -9 ÷ 3

-x = -3 × (-1)

x = 3

h) -x = 15 ÷ 5

-x = 3 × (-1)

x = -3

i) onde está o x aqui?

j) 3x = -15

x = -15 ÷ 3

x = -5

k) 5x = 40

x = 40 ÷ 5

x = 8