Question

1) resolver as equações do 1 grau :
a) 10 - 2x + 3 = x + 2

b) x - 10 = 0

c) 2x - 3 (x+2) = x + 6

Answer 1

A) 2x+x= -10 -3 +2
   x= -11
    x= -11

B) x= 10

C) 2x-3x-6=x+6
 -x-6=x+6
 -x-x=6+6
  -2x=12 .(-1)
   2x= -12
     x= -12/2
     x=-6

Answer 2

A) 10-2x+3=x+2
     13-2x=x+2
      2x-x=2-13
      x= -11
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B) x-10= 0
     x=10
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C) 2x-3(x+2)=x+6
    2x-3x-6=x+6
     -x-6=x+6
      -x-x=6+6
       -2x=12 .(-1)
        2x= -12
         x= -12/2
         x=-6