exam Maths Puzzle Numerical Ability

The percent of single women within 20-24 age that never married went from 55% in 1970 to 73% in 2000. Let 1970 be year 0 and 200 be year 30.
A)Find and interpret slope line throu

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I really need help finding the partial sum of the arithmetic sequence
aof n=2n; Sof 7
5x-(2x+2)=x+(3x-5)
Could you help me to solve this problem?

Thank you