Tìm x: x(x + 2) = x(x + 3)

Tìm x:
a) x(x+2)=x(x+3)
b)11x+42-2x=100-9x-22
c)2x-(3-5x)=4(x+3)
d)2(x-3)+5x(x-1)=5x bình 2