Question

me ajudem por favor​

Answer 1

Resposta:

a) 3x-9=9

3x=18

x=18/3

x=6

b)x-5=-7

x=-7+5

x=2

c) y-6=5y+8

y-5y=8+6

-4y=14

y=14/-4

y=-3,5

d)10x=20+9x

10x-9x=20

x=20

e)2x+5-x=5-3x

2x-x+3x=5-5

4x=0

x=0/4

x=0

f)2m+6=m

2m-m=-6

m=-6

g)2x+1=15

2x=15-1

2x=14

x=14/2

x=7

h)5-x-20=5x-10-7x

-x-5x+7x=-10+20-5

x=5

i)x+6=2-3x

x+3x=2-6

4x=4

x=4/4

x=1

Explicação passo-a-passo: