exam Maths Puzzle Numerical Ability

Write an algebraic expression, an equation or an inequality.

The difference of 3 times a number x and 11

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exam Other Question

on the 1st day 2721 entered the contset. four times that many entered the contest the 2nd day. only 977 entered the contest on the third day. how many entered the contest in all? solve the system by substitution

4x-4y=0
y=2x-5