Question

resolva as seguintes equações a)y-6=5y+8 b)10x=20+9x c)5-x-20=5x-10-7x d)x+6=2-3x e)2x+6=30

Answer 1

a)

y-6=5y+8

y-5y=8+6

-4y=14 tudo multiplicado por (-1)

y=14/4

y=7/2

b)

10x=20+9x

10x-9x=20

x=20

c)

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

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

-13x=5

x=-5/13

d)

x+6=2-3x

x-3x=2-6

-2x=-4

x=4/2

x=2

e)

2x+6=30

2x=24

x=24/2

x=12