exam Maths Puzzle Numerical Ability

Solve the following system of linear inequalities by graphing.
x + 2y <= 3
2x - 3y <= 6

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exam Other Question

"Explain in your own words(at least 50 words) why the line x = 4 is a
vertical line?"

I think i know the answer i just have a hard time explaining this can you help me?
solve the inequality
3(3y+1)<13y-8