Question

responda pfv

a)3x/2+1/5=7/10
b)9x-4=15
c)4 (3x+5)=6 (x+9)​

Answer 1

Explicação passo-a-passo:

a)3x/2+1/5=7/10

3x/2+0,2=0,7

3x/2=0,7-0,2

3x/2=0,5

3x=2.(0,5)

3x=1

x=1/3

b)9x-4=15

9x-4=15

9x=15+4

9x=19

x=19/9

c)4 (3x+5)=6 (x+9)

4.(3x+5)=6.(x+9)

12x+20=6x+54

12x-6x=54-20

6x=34

x=34/6

x=34÷2/6÷2

x=17/3