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55+(18-100÷a)+(8×10-32÷4):2=67cat este ?a

Răspuns :

55+(18-100÷a)+(8×10-32÷4)÷2=67
55+(18-100÷a)+(80-8)÷2=67
55+(18-100÷a)+72÷2=67
55+(18-100÷a)+36=67
18-100÷a=67-55-36
18-100÷a= -24
-100÷a= -42
a= -100/-42 =2,38