Question

Preciso pra amanhã, urgente!!!

calcule o valor de x:

A) (7*1)+2x= 5x-2
B)10x+7x+1=6x+12+5+1
C)5x+2x+3= 3x+4+2x+1+x+3

urgente !!!​

Answer 1

a) (7*1)+2x= 5x-2

7+2x=5x-2

7+2=5x-2x

9=3x

x= 9/3

x=3

b) 10x+7x+1=6x+12+5+1

17x+1=6x+18

17x-6x= 18-1

11x=17

x= 17/11

c) C)5x+2x+3= 3x+4+2x+1+x+3

7x+3=6x+4+2+1+3

7x-6x= 4+2+1

x= 7

Answer 2

I) 7+2x=5x-2

7+2=5x-2x

9=3x

x= $\frac{9}{3}$

x=3

II) 17x+1=6x+18

17x-6x= 18-1

11x=17

   x= $\frac{17}{11}$

III)7x+3=6x+4+2+1+3

7x-6x= 4+2+1

      x= 7