exam Maths Puzzle Numerical Ability

find the value of x in 2x-15=2x+15

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exam Other Question

How do you find the slope of the line containing the points (-1, -1/5) and (2/3, 3/4)? I am confused about this because I do not understand how to find the slope when the points contain fractions and/or decimals. Write an expression for the slope of a line passing through the points (0,3) and (x, -9). What value of x will make the fraction equivalent to -2.

Thank you!!!
Melanie