Question

1) Resolva as seguintes questões:

a)3x = 15 b)2x = 14 c) 4x = - 12





d)7x = - 21 e) 13x = 13 f) 9x = - 9

g) 5x + 15 = 5 h) 8 + 4x = 16​

Answer 1

Resposta:

a) x = 5

b) x = 7

c) x = -3

d) x = -3

e) x = 1

f) x = -1

g) x = -2

h) x = 2

Explicação passo-a-passo:

a) 3.x = 15

  x = $\frac{15}{3}$ = 5    x = 5

b) 2.x = 14

x = $\frac{14}2}$ = 7       x = 7

c) 4.x = -12

x = $\frac{-12}{4}$ = -3    x = -3

d) 7.x = -21

x = $\frac{-21}{7} =$  -3   x = -3

e) 13.x = 13

x = $\frac{13}{13}$ = 1      x = 1

f) 9.x = -9

x = $\frac{-9}{9}$ = -1     x = -1

g) 5.x + 15 = 5

5.x = 5 - 15

5.x = -10

x = $\frac{-10}{5}$ = -2    x = -2

h) 8 + 4.x = 16

          4.x = 16 - 8

          4.x = 8

             x = $\frac{8}{4}$ = 2    x = 2