book Maths Puzzle Numerical Ability

1/x-4=1/2x+7

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book Other Question

Solve for t and find the digit that equals a: [3(230+t)]^2=492,a04 the expense of a bus trip for a group of students was $144. if an additional 6 children were taken, each child would pay $1.20. how many childrenwere there in the original group?