exam Maths Puzzle Numerical Ability

The distance from Baltimore to New York is about 171 miles. This is about 189 miles less than the distance from Baltimore to Boston. How far is Baltimore from Boston if you stop in

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exam Other Question

Find the exact solution to 6x(squared)+1=-8x by using the Quadratic Formula.

Thanks. This is my first year and I greatly appreciate your help. Use the Gauss-Jordan method to slove the sysetm:
3x+y-2z=-1
2x-3y+2z=9
x+y+z=2