Question

Resolva as equações seguinte

a)5(s-1)=94-2(s+4)
b)3(s-4)=80-2(3s+1)

Answer 1

a) 5 (s-1) = 94 -2 (s+4)
  5s -5 = 94 -2s -8=
5s +2s=  94 - 8 +5
7s = -86 +5
7s = 91
s=91/7
s=13



b) 3 (s-4) = 80- 2 (3s +1)
     3s -12 = 80 - 6s -2
       3s +6s = 80 +12 -2
        9s =  92-2
        9s =90
          s= 90/9
          s = 10