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If 2x + y = 13 and 3x - y = 12, what are the values for x and y?

To solve these simulataneous equations we need to use substitution :If 2x + y = 13 then y = 13 - 2xTherefore 3x - y = 12 can be rewritten as 3x - (13 - 2x) = 12We can expand these brackets and solve for x :3...
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Answered by Emma W. • Maths tutor
15479 Views

What is real politik? What are some examples?

Real politik is the political approach of self-sufficiency. Decisions on public policy, when approached from a position of real politik, are not afforded time for sympathy or compassion. Rather, real politik...
KK
35586 Views

How do you use 90mins to write 6 short essays? It is very difficult as i always run out of time.

The best way to tackle this is to practice strictly with time before the exam. I understand your frustration with the time limit especially when you know a lot. Doing loads of essay plans is very important i...
HU
3405 Views

How do i write a good paragraph for an essay?

In order to write a good paragraph for an essay you should use the PEACE paragraph. This is writing the point you want to make to answer the question and explaining the point made then further using examples...
HU
Answered by Hannah U. • Sociology tutor
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The price of a book is 4 pounds. In a sale the price is reduced by 30 percent. Work out the sale price

If we first calculate 30% of £4 to work out how much the price of the book has been reduced by.10% of £4 is £0.40. We know 30% will be this value multiplied by 3. Therefore 30% of £4 is £1.20.Now that we kno...
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Answered by Aidan T. • Maths tutor
10527 Views