exam Maths Puzzle Numerical Ability

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Y(3Y-8)(5Y+3)=0

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exam Other Question

Solve each of the following systems by addition. If a unique solution does not exist, state
whether the system is inconsistent or dependent.
x+5y=10
-2x-10y=-20
in 1990,the life expectancy in males in a certain country was 63.1 years.in 1996 it was 65.4 years.let E represent the life expectancy in year t and let t represent the numbers si