Question

5) Resolva as equações sendo U=R:

a) x -279 = 237
b) x + 9 = -1
C) 6x - 10 = 2x + 14
a) 3 (x ÷ 2) = 15
e) 2 (x - 1) - 7 = 16
f) x/2 + x/4 = 1/2
g) x/2 - x/4 = 5​

Answer 1

Resposta:

Olá bom dia!

a) x -279 = 237

x  = 237 + 239

x = 476

b) x + 9 = -1

x = -1 - 9

x = -10

c) 6x - 10 = 2x + 14

6x - 2x = 14 + 10

4x = 24

x = 24/4

x = 6

d) 3 (x ÷ 2) = 15

3x/2 = 15

3x = 2(15)

3x = 30

x = 30/3

x = 10

e) 2 (x - 1) - 7 = 16

2x - 1 - 7 = 16

2x = 16 + 8

2x = 24

x = 24/2

x = 12

f) x/2 + x/4 = 1/2

(2x +x)/4 = 2

3x = 2

x = 2/3

g) x/2 - x/4 = 5​

(2x - x) / 4 = 5

2x - x = 20

x = 20