Explicație pas cu pas:
1900-7×(x+27³⁰:27²⁸)=219
1900-7×(x+27²)=219
1900-7×(x+729)=219
1900-7x-5103=219
1900-5103-219=7x
-3422=7x
x=-3422/7
pare gresit dar idk