exam Maths Puzzle Numerical Ability

Solve for the approximate value of x: In x=3
Is it 3?

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exam Other Question

Write the fraction as a percent.
1 1/5 (One and one/fifth)

can someone please help me with this? I have never been good with these kind of problems and obviously nothing has changed. I just do not understand how to do this.
This problem is a matrice problem:)

1 -3 4
0 2 6
-3 1 -1