exam Maths Puzzle Numerical Ability

solve for x:

1) a(x-3)+8=b(x-1)

2) a(3tx-2b)=c(dx-2)

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exam Other Question

1)12xy^2-108x

2)3a^3b^2+81b^2

3)3x^4-48

4)2x^4+x^2-3
y=13x+17
x=-1