Răspuns :
((x-100) X 2 ):4 = 78
((x-100)X2) = 78 X 4 =312
x-100 = 312:2=151
x-100=151
x=151+100
x=251
((x-100)X2) = 78 X 4 =312
x-100 = 312:2=151
x-100=151
x=151+100
x=251
(x-100)*2:4=78
(x-100)*2=78*4
(x-100)*2=312
(x-100)=312:2
x-100=151
x=151+100
x=251
(x-100)*2=78*4
(x-100)*2=312
(x-100)=312:2
x-100=151
x=151+100
x=251