exam Maths Puzzle Numerical Ability

Can someone please help me with this problem too.
Write an equation in slope-intercept form that satisfies each condition.
passes through (2,-1) and is perpendicular to 3x-y=-3

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exam Other Question
adult tickets for a play cost $5 and children tickets cost $2 for 1 person. 460 tickets were sold. Receipts were $1880. Find # of adult tickets sold. Please help me with this problem! Can someone help me solve this problem?

I need to solve for x and check the results:

-4(2x - 3) = -8x + 5

Thanks,
Sher