Question

Quais as respostas das equações: A)30-20+2x=10 B)20x-30=40+30-20 C)-5x+45-89=90+41 D)10x-12-10=18-20 E)13x-23-45=7x+12 Por favor preciso da resposta correta.

Answer 1

Resposta:

a) x=0

b) x=4

c) x= -134/5

d) x= 2

e) x= 40/3

Explicação passo-a-passo:

a) 30-20+2x=10

10+2x=10

2x=10/10

2x=0

x=0/2

x=0

b) 20x-30=40+30-20

20x-30=50

20x=50+30

20x=80

x=80/20

x=4

c) -5x+45-89=90

-5x-44=90

-5x=90+44

-5x=134

x=134/-5

x= -134/5

d) 10x-12-10=18-20

10x-22=-2

10x=-2+22

10x=20

x=20/10

x=2

e) 13x-23-45=7x+12

13x-68=7x+12

13x-68-7x=12

6x-68=12

6x=12+68

6x=80

x=80/6

x= 40/3