exam Maths Puzzle Numerical Ability

Solve. -4(x + 10) + 2x = 3x + 0

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exam Other Question

If the positions of the digits of a two-digit number are interchanged, the number obtained is smaller than the original number by 27. If the digits of the number are in the ratio of 1:2, what is the original number? 3x+2y-2=8
-3x+4y+5z=-14
x-3y+4z=-14