exam Maths Puzzle Numerical Ability

If two numbers are opposite of each other, are their reciprocals also opposite of each other

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Would somebody please help me solve this equation: -3(3x + 15)-(10 + x)=35
Thank You, Patrick
The 4 functions here are y=e^x, its double y=e^(2x), the inverse of the exponential function, which is the natural logarithmic function y=ln(x) and its double y=ln(2x).

For th