exam Maths Puzzle Numerical Ability

(4x^5 + 7x^4 - 3x^2 + 9) + (6x^5 -8x^4 + 2x^3 - 7)

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exam Other Question

Solve for x: {(3^x9^x+20)/(27^2x+5)}=81^x+5 Convert this inequality into an equation by adding a slack variable.
2x1 + 4x2 + 3x3 ≤ 100

Is this correct? 2x1 + 4x2 + 3x3 s1 = 100

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