Tìm x: a, -(35 - x) - (37 - x) = 33 - c; b, x^4 = x^10; c, (x + 2)^12 = (x + 2)^20

Tìm x
a, -(35-x) - (37-x) =33 -c
b, x mũ 4= x mũ 10
c, (x+2) mũ 12=(x+2) mũ 20