exam Maths Puzzle Numerical Ability

Using this equation: state tax =.06(300,000- federal tax) and federal tax=.40(300,000-state tax)

how on earth is this solved?

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exam Other Question

Solve for "x" in each of the following logarithmic equations.
a) x=logbase6 9 + logbase6 8 - logbase6 2
b) x=logbase8 sqrt80 - logbase8 sqrt5
The problem is--- Solve the inequality and graph the solution set

5x-1<4 and x-2>-1

I got x<1 and x>1 which I believe are right. However, I am unsure how to graph this. The