exam Maths Puzzle Numerical Ability

4x-4y-z=38
What does x =?

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exam Other Question

A population is increasing at a rate of 0.6% each year. The population is currently 3000. find the function p(t)that gives the size of the population t years from now.
solve the system of inequalities by graphing. if the system does not have a solution, write no solution.

2y+x<4
3x-y>1