Question

determine o valor das equações:
a) 3-(3x-6)=2x+(4-x)
b)4.(x-2)=4+2.(x-1)
c)7x-3.(x-2)=3.(x+4)
d)2.(y-2)+5.(2-y)=-3.(2y+2)
e)2.(1-t)+1=3.(t-3)-2t

Answer 1

a)3-(3x-6)=2x+(4-x)
   3-3x+6=2x+4-x
   -3x+x=4-9
   -2x=-5
    x=-5/-2
    x=2,5
b)4(x-2)=4+2(x-1)
   4x-8=4+2x-2
   4x-2x=2+8
   2x=10
   x=10/2
   x=5
c)7x-3(x-2)=3(x+4)
   7x-3x+6=3x+12
   4x-3x=12-6
   x=6
d)2(y-2)+5(2-y)=-3(2y+2)
   2y-4+10-5y=-6y-6
   2y-5y=-6+4-10
   -3y=-12
   y=-12/-3
   y=4
e)2(1-t)+1=3(t-3)-2t
   2-2t+1=3t-9-2t
   -2t+t=-9-1-2
   -t=-12(-1)
   t=12