exam Maths Puzzle Numerical Ability

x+3 + x-1 = 9
x-2 x+1 2

solve for x

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exam Other Question

what is the answer to this question: z raise to power -1/4 = 1/3 HELP!!! PLEASE!!

Solve: sqr is for square root.
7((2x-5)-(x+1))=(sqr7 +2)(sqr7 -2)