exam Maths Puzzle Numerical Ability

24u-6(8-4u)+52=

Please show the steps to slove so I can use it as an example.

Thanks,
Bruce

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exam Other Question

d...ch5

#21
solve:

((x)/(5x+10)) + ((x-3)/(x+2)) = (7)/(5)

#23
multiply

((-3a^2b^)/(35a^5))* ((14a^3b^2)/(-9b^4))

#26
add. Express your answer in simplest form. word problem:

Suppose y=mx+b is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b