Question

resolva as equações: a) x+28=11 b)7x=-21 c)2x/5=4 d)-x=-2​

Answer 1

Resposta:

a) x+28=11

x = 11 - 28

x = -17

b) 7x=-21

x = $\frac{-21}{7}$

x = -3

c) $\frac{2x}{5}$=4

$\frac{2x}{5}$ = 4

2x = 20

x = $\frac{20}{2}$

x = 10

d)-x=-2​

x = 2

Answer 2

Explicação passo-a-passo:

a) x+28=11

x=11-28

x=-17

b) 7x=21

x=21

7

x=3

c)2x =4

5

2x=5×4

2x= 20

x=20÷2-

x= 20

d) -x=-2

x= +2