exam Maths Puzzle Numerical Ability

solve for x:
log base 4(x^2+3x)=1+log base 4(x=5)

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exam Other Question

a sweater cost $12 more than a shirt. Together they cost $46. What was the price of the shirt? Find the equation of the line in point slope form that passes through (4,3)and is parallel to the line 3x-y=7.