exam Maths Puzzle Numerical Ability

4(1.5c + 6) - 2c = -9

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exam Other Question

Please help me to solve 9/(x-5)-1=8/(x+5)

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Can someone please help me with problem?

These data represent the population of a certain geographic region.
Year Population (in millions)
1950 34
1960 38
1970 43
1980