exam Maths Puzzle Numerical Ability

Chapter 3.3 exercises.
#38 1/4(t+10)=5
#18 2/3(x+8)=8

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exam Other Question

Solve the system using the substituion method.
2x - 5y = 9
-3x + y = -7 Find the polynomial function of the lowest degree with the rational coefficients that has the given numbers as some of it's zero's.
3-sqrt(3),1-i.
I have worked on this and belie