exam Maths Puzzle Numerical Ability

THE EQUATION: 2(X-2)=X+3

FIRST STEP IN SOLVING: 2X-2=X+3

WRITE A CLEAR EXPLANATION OF WHAT ERROR HAS BEEN MADE. WHAT COULD BE DONE TO AVOID THIS ERROR?

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exam Other Question

Three integers have these characteristics: their sum is 12; the sum of the smallest and largest integers is 7; the middle integer is one third of the largest integer. What are the integers? Enter the simplified form of square root of 75