exam
Maths Puzzle
Numerical Ability
How do you make a table of values
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exam Other Question
A painter works on a job for 10 days and is then joined by her helper. Together they finish the job in 6 more days. Her helper could have done the job alone in 30 days. How long would it have taken the painter to do the job alone?
Kindly show me step by step how to do this:
Given that a - b = 10, c - d = 14, and 7a + 5d = 23, what is the value of ac - bd?