exam Maths Puzzle Numerical Ability

Three times a whole number is 10 more that half the number. What is the number?

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exam Other Question

please help me solve this equation sin 2x-cosx=0 WRite the standard form of the equation of the line through this pair of points. Write the equation using only integer cofficients; (9,-1) and (-5, 10).

The equation is ___x + ____y = _____