book Maths Puzzle Numerical Ability

Solve and write a solution set.

5x + 7 > 4x +8
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The greater than sign is suppose to be underlined. Wanted to give you all of the facts. This is tough so really nee

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book Other Question

The sum of the digits of a two digit number is 9. if the digits were reversed the new number would be 9 more than the original number. find the original number. How do you plot y=x+2 on a graph?