exam Maths Puzzle Numerical Ability

A number decreased by 23 is equal to 214. Find the number. How would i figure this problem out? Thanks

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exam Other Question

Hello, can someone help me factor this problem?

1.m^3-27

I need help trying to solve these problems

1.x^3-x^2-20x=0

2.5x^2+3x=2

3.x(x-x5)=36

Thanks In the coordinates (5,-4) which number represents the y value? The answer to this is -4. The next question is "What are the coordinates of the origin?"