exam Maths Puzzle Numerical Ability

please help me with this problem.

1) 5=|2x/7 + 4/7| -3

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exam Other Question

Mom baked a cake for the entire family. Dad ate 1/6 of the cake. Brother ate1/5 of it. Sister ate 1/4 of what was left after that. Spot ate 1/3 of what was left. Baby sister ate 1/ simplify

-9-6
_________
-2-1(3)