Question

me ajudem por favor​

Answer 1

Resposta:

a)6

b)272

c)8

d)31/3

e)1

f)25/4

Explicação passo-a-passo:

a)7x-29=13

7x=13+29

7x=42

x=6

b)x/4+10=78

x+40=312

x=312-40

x=272

c)10(2x-5)=12x+14

20x-50=12x+14

20x-12x=14+50

8x=64

x=8

d)3x+1/2=-16

3x+1=32

3x=32-1

3x=31

x=31/3

e)-21x+45=-3x+27

-21+45=24

-21=24-45

-21x=-21

x=1

f)-5x=-9x+25

-5+9x=25

4x=25

x=25/4