Question

[(x+428:4)*2+5]*2-186=800

Answer 1

[(x+107)x2+5]x2=800+186=986
(x+107)x2+5=986:2=493
(x+107)x2=493-5=488
x+107=488:2=244
x=244-107=137

Answer 2

[(x+428:4)*2+5]*2-186=800
[(x+107)*2+5]*2=800+186
[(x+107)*2+5]*2=986
[(x+107)*2+5]=986/2
[(x+107)*2+5]=493
[(x+107)*2=493-5
(x+107)*2=488
(x+107)=488/2
(x+107)=244
x=244-107
x=137