Question

9x+2=7x

3x-7=-2x+5

8x-7=-2x-5

10+( x-2 )=5 ( 2-x )

Answer 1

oi Evy...

vejamos...

9x+2=7x
9x -7x = 2
      2x = 2
        x = 2/2
        x = 1


3x-7=-2x+5
3x +2x = 5 +7
       5x = 12
         x = 12/5


8x-7=-2x-5
8x +2x = -5 +7
     10x = 2
         x = 2/10       simplificando por 2
         x = 1/5


10+( x-2 )=5 ( 2-x )
10 +x -2 = 10 - 5x
x +5x = 10 - 10 +2
     6x = 2
       x = 2/6
       x = 1/3