book Maths Puzzle Numerical Ability


I could not find any lessons for my brother on Adding and Subtracting algebraic fractions. Could you please help me. Could you also show me how to type in fractions. In this problem x is under x+2 then you add with x+1 under x. Thank you

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book Other Question
x^2 + 2x - 15 = 0 The earth weighs 5.974E21 metric tons and the sun is 1.99E27 metric tons how much more does the sun weigh in metrix tons. The answer should have atleast 4 digits.