Question

descubra o valor de x:
a)x+5=15
b) x=(-2).(+3)
c) -2+x=9
d)x.(-6)=54
e) 2x-1=3
f) 3x+4=1

Answer 1

a) x+5=15    b)x=(-2).(-3)    c) -2+x=9   d) x.(-6)=54

x=15-5             x= 6                 x=9+2       -6x=54 (-1)

x=10                                         x=11          6x=54    

                                                                   x=54/6  x=9

e)2x-1=3           f)3x+4=1

  2x=3+1              3x=1-4

  2x=4                   3x=-3   

   x=4/2 x=2          x=-3/3  x=-1