exam Maths Puzzle Numerical Ability

In the parking lot at a truck stop there were 6 more cars than 18 wheels trucks. There were 134 wheels in the parking lot. How many cars and trucks were there?

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Simplify

-5^0[-3^3-3(-3-2)](-4^0)
determine the perpindicular distance between
a. the parellel planes: x+2y+3z+6=0 and x+2y+3z-6=0