exam Maths Puzzle Numerical Ability

Is the given number a solution of the equation?

9k = 10 - k; -1

-7r - 15 = -2r; -3

-3p = 4p + 35; -5

8 -e = 2e - 16; 8

5 - 15s = 8 - 16s; 3

2(x - 2) - 5x = 5(2 - x); 7

6a + 3 = 3(3a - 2); 4

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exam Other Question

Paloma Rey drove to work on Wednesday at 40 miles per hour, an darrived one minute late. She left home at the same time on Thursday, drove 45 miles per hour, and arrived one minute early. How far does Ms. Rey drive to work? A radioactive isotope has a half-life of 3000 years. If a sample of this isotope origanally has a mass 30g, what equation would model the mass of this sample over time? What would its mass be after 5 hours?