Question

A) 2 x + 9 = 4x - 21

B) 3 (2 x - 1) = 2 (x + 1) + 3

C) 3 (x + 2 ) = 15

D) 5 ( x - 1) = 30

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

Alguém me ajuda?​

Answer 1

Óia eu aqui de novo (rsrs)

a) - X.(8 + 12 ) + 30 = 60

-8x+12x+30=60

4x==60-30

x=30/4

x=7.5

b) 15x - 10 +x=9x - 50

15x+x-9x=-50+10

6x=40

x=40/6

x=6.6

c) 12 + 5.( x + 10-1) = 300

12+5x+50-5=300

5x=300-57

x=243/5

x=48.6

d) 90 + 4x + x - 60 = 3x + 60

5x-3x=60-30

2x=30

x=30/2

x=15

♡(˃͈ દ ˂͈ ༶ )