Question

galera ajuda aí pfv(✿^‿^)

e) 13 + 4(2x - 1) = 5(x + 2)
f) 4(x + 5) + 3(x + 5) = 21
g) 2(x + 5)-3(5 - x) = 10
h) 8(x - 1) = 8 - 4(2x - 3)​

Answer 1

e)

13 + 4(2x - 1)= 5(x + 2)

13 + 8x - 4= 5x + 10

8x - 5x= 10 - 13 + 4

3x= 1

x= 1/3

f)

4(x + 5) + 3(x + 5)= 21

4x + 20 + 3x + 15= 21

4x + 3x= 21 - 20 - 15

7x= - 14

x= - 14/7

x= - 2

g)

2(x + 5) - 3(5 - x)= 10

2x + 10 - 15 + 3x= 10

2x + 3x= 10 - 10 + 15

5x= 15

x= 15/5

x= 3

h)

8(x - 1)= 8 - 4(2x - 3)

8x - 8= 8 - 8x + 12

8x + 8x= 8 + 12 + 8

16x= 28

x= 28/16 >> ÷ 4

x= 7/4