Question

Resolva as equações de 1 grau em R :
5{ 3-2 [x-4(2-x]}=x-7

b) x-3/2 + 5/3= 7-x/4

me ajudem pf

Answer 1

5{ 3 -2 { X -4(2 -X ) } = X-7

5{ 3-2{X -8 + 4X } =X-7
5 { 3- 2 { 5X -8 }} = X -7
5 { 3 -10X +16 } = X -7
5{ -10X + 19 } =X -7
-50X +95 = X -7
-50X -X = -95 -7
-51X =  -102 (-1)
51 X = 102
X= 102 / 51
X =2 


B) X -  3/2 +  5/3 = 7 -  X/4      FAZ O MMC = 2.3.4 12
    12X - 18 + 20 = 84 - 3X
    12X +3X  = 84 +18 -20
      15X   =   102 -20
          X   = 82/15