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Solve algebraically: 6x + y = 16, 5x - 2y = 19

The first step to eliminate one of the unknowns, in this case x or y . This can be done by making the coefficient (the number before) of one of the unkowns the same number, or the negative of the same number...
CR
Answered by Caitlin R. • Maths tutor
5899 Views

Solve the following simultaneous equation: 3x+2y=20 and x+4y=20

We are going to try to eliminate one of the variables in one of the equations. This can be done by rearranging the second equation to x=20-4y. And then substituting x into the first equation.3x+2y=20 => 3...
SK
Answered by Stephanie K. • Maths tutor
5720 Views

67,854 people went to a football match. What is this number rounded to the nearest thousand?

We need to convert the number 67,854 (XX,XXX) to the form XX,000. We need to round it to the nearest thousand. The digit for the thousand is 7, so we move on to the digit on its right, which is 8.Now, if the...
SK
Answered by Stephanie K. • Maths tutor
5431 Views

Factorize x³-x

x³-x=x(x²-1)=x(x+1)(x-1)
JQ
Answered by Jia Qin L. • Maths tutor
19392 Views

What is the cubed root of 0.1?

This is a question you may be asked in an Oxbridge interview for a course with any mathematical aspect. They are expecting you to find an answer without a calculator, but more importantly than finding the an...
JM
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