exam Maths Puzzle Numerical Ability

27^3x=9^4x-2

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exam Other Question

Tim bought 3 times as many .20 stamps as .10 stamps and 6 times as many .10 at .05 stamps. He spent $63.75 on stamps. How many of each kind did he buy? For the equation x - --x = 0, how do I solve for all values of x that satisfies the equation?