Question

105+5{3+7*2+2*[5+3*7-2*(3+2x)]}

Answer 1

105+5{3+7*2+2*[5+21-6-4x)]}= 105+5{3+7*2+2*[20-4x]}=105+5{3+14+40-8x}=105+5{57-8x}= 105+ 285-40x=> 105+285= 40x=> 390=40x=> x=390/40=39/4

Answer 2

105 + 5 x { 3 + 7 x 2 + 2x [ 5 + 3 x 7 - 2 x ( 3 + 2x )]}=
105 + 5 x { 3 + 14 + 2 x [ 5 + 21 - 2 ( 3 +2x)]}=
105 +5 x { 17 + 2 x [ 26 -6 -4x]}=
105 + 5 x [ 17 + 2 x ( 26 - 6 - 4x)]=
105 + 5 x [ 17 + 52 -12 -8x]=
105 + 5 x ( 69 - 12 - 8x)=
105 + 5 ( 57 - 8x)=
105 + 285 -40 x =0
390 - 40 x = 0
- 40 x = - 390 /-
40 x = 390
x = 390 : 40
x = 9 ,75