Question

resolva as equações:
(contas pfvr! )

a) x/5 + 2 = 3x - 26

b) - 3/5 + 5x/4= 2x + 1/2

c) 1+x/2=3

d) 2x/5= 12


Com urgência!!!

Answer 1

a) x + 2 = 3x - 26 ==> x + 10 = 15x - 130 ==> 15x -x = 10+130
    5

==> 14x=140 ==> x = 10
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b) - 3 + 5x = 2x + 1  ==>  -12 + 25x = 40x + 10 ==> 40x - 25x = -12-10
      5     4             2

15x = - 22 ==> x = - 22/15
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c) 1+x = 3 ==> 2 + x = 6 ==> x = 6 - 2 ==> x = 4 
        2
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d) 2x = 12 ==> 2x = 60 ==> x = 30
     5