exam Maths Puzzle Numerical Ability

3y-2
-4y+8

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exam Other Question

6x-4(9-x)=106 ;7 Solve:
a) logbase5 6-logbase5 x=logbase5 2
b) logbase2 8-logbase2 4=x
c) logbase3 27+ logbase3 9-logbase3 81=logbase3 x
d) logbase2 8+logbase2 4-logbase2 2=x