exam Maths Puzzle Numerical Ability

-3(4x+3)+4(6x+1)=43

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exam Other Question

passes through (1,4) and is parallel to a line whose equation is y=3x+5?

my start: 4=3x+5
4=3(1)+5
-3+4=-3+3+5
1=x+5 ?????
i dont get how to do these!!!!! help me!!!