exam Maths Puzzle Numerical Ability

y=(3/4)x+12

2x/3+1/2=2
I need help on solving these equations

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exam Other Question

If f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x)>0.

Thanks for your time. Hello I need some one to help with this solution please. Last year ralph had $5 million in operation income. there was net depreciation of $1 million and interest expense of $1mill