book Maths Puzzle Numerical Ability

How do you solve an equation and leava it in standard form?
Ex. parallel to 3x+5y=8,when passing through (-1,7)?

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book Other Question

Can you please help me solve this problem? I would greatly appreciate your help! Find each sum or difference, and show all work.</b>

3t + 2/ t - 2 + t + 2/ t^2 - 4

Thanks! Charles is x years old now. Express his age 12 years ago.