a-b=(a+b):4
a+b=(a-b)+234
a+b |___|___|___|___|
a-b |___|........................
234
234:3=78(a-b)
78×4= 312(a+b)
a+b=312
a-b=78-->a=b+78
a |___|........| ]
78 ] 312
b |___| ]
312-78= 234(suma partilor egale)
1+1= 2 (parti egale)
234:2=117(b)
117+78= 195(a)
