уравнение 85-(17+x)=31

Question

уравнение 85-(17+x)=31

Answer 1

85-(17+x)=31
17+х=85-31
17+х=54
х=54-17
х=37
______________
85-(17+37)=31
31=31

Answer 2

17+х = 85-31
17+х=54
х=54-17
х=37
85-(17+37)=31
ответ :х=37