exam Maths Puzzle Numerical Ability

I need help on these two questions

1. Solve for x when [5x-7]=14

2. Multiply the complex numbers (4+3i)(6+i)

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exam Other Question

Find the smallest whole number that when divided by 5,7,9, and 11, respectively, gives remainders of 1,2,3,and 4. Textbook Beecher and Penn

Perform the operation and simplify x^2-2x-15/x^2+x-6*x^2-4/x^2-2x-35

Thanks for your help!