Question

resolva as equações:
a)5x+3x=16
b)x+x+8=54
c)7x-2-5x=18
d)12x-10x-4=3
é)-x-2x-4=11
f)8x=5x+5
pfv me ajudem

Answer 1

a. 5x+3x=168x=16
x=16/8
x=2
b. x+x+8=54  2x=54-8
  2x=46
    x=46/2
    x=23
c. 7x - 2 - 5x = 187x - 5x = 18 + 2
2x = 20
x = 20/2
x = 10
d. 12x - 10x - 4 = 312x - 10x = 3 + 4
          2x = 7
            x = 7  ou 3,5
                  2
e. 8x = 5x + 4,58x - 5x = 4,5
3x = 4,5
x = 4,5/3
x = 1,5
 
 f. -x-2x-4=11-x-2x=11+4
-3x=15
-x=15/3 (-1)
x=-5

Espero ter ajudado :D