exam Maths Puzzle Numerical Ability

Solve loga (7x +1) = loga (4x +16)
a. 4
b. 5
c. 6
d. 8

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exam Other Question

Solve the inequality 2|x-10|less than sign 3, and express the solution as an interval. Thank you! simplify and evaluate
(4^2x^3y^-2z^-3/x^-5y^8z^-8)^2