Question

va rog ajutati-ma ca nu prea am inteles cum se rezolva
90+{8:4*[20-5*(49:7-36:6)*a]}=100

Answer 1

90+{8:4*[20-5*(49:7-36:6)*a]}=100
{8:4*[20-5*(7-6)*a]}=100-90
2*(20-5a)=10
20-5a=5
5a=15
a=3