Zaire drove 6 more kilometers than Zeenan. Shazore drove thrice as far as Zaire. Altogether, they drove 99 kilometers. Write the equation

Zaire drove 6 more kilometers than Zeenan.
Shazore drove thrice as far as Zaire. Altogether,
they drove 99 kilometers. Write the equation to
represent the situation. Use d to represent the
numbers of kilometers Zeenan drove.
How many kilometers did Shazore drive than Zaire?