exam Maths Puzzle Numerical Ability

Thank you in advance for helping me with writing this problem in interval notation. The absolute value of 5x-3=10

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exam Other Question

If the line is perpendicular to 3x-4y=2 and B=2 then solve for A. Keeping in mind the equation Ax+By=13 can you please help me i forgot how to add, multiply,subtract, and divide fraction
thank you for your help