exam Maths Puzzle Numerical Ability

(x/(4x-4)+(5/(x^2-1)=1/4 i keep coming up blank on this one for some reason thanks a lot for the help

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exam Other Question

Solve -6<3+x<4 The average salary for computer progammers is $7740 less than twice the average salary for carpenters. Combined, their average salaries are $99000.Determine the averaage salary for each of these job.