exam Maths Puzzle Numerical Ability

A triangle has 3 sides. 3x +7, 4x - 9, 5x + 6. What is the expression that represents its perimeter?

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exam Other Question

I need help with this problem. 24 is 66 2/3 of what number A common mistake when solving equations is the following:
The equation: 2(x - 2) = x + 3
First step in solving: 2x - 2 = x + 3
Write a clear explanation of what error has been