exam Maths Puzzle Numerical Ability

if my problem was5x+9=39 and i had to do five steps how would i solve this problem

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exam Other Question

Lopez spent 1/3 of his vacation money for travel and 2/5 of his vacation money
for lodging. He spent $1100 for travel and lodging. What is the total amount
of money he spent on h
Help please
I am trying to figure out how to factor this to get the difference of two cubes:
27-u^3. Thank you!!!