exam Maths Puzzle Numerical Ability

expand by use of minors.
3 4 -2
6 4 3
0 4 2

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exam Other Question

During rush hour, Fernando can drive 45 miles using the side roads in the same time that it takes to travel 30 miles on the freeway. If Fernando's rate on the side roads is 9 mi/h Can u pease help me w/ the following problem... 4(3x-4)=8(17-8)