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Maths
GCSE

Find x when 2x-3=5

To find what x is, we must rearrange the equation so that it says x=. To do this we need to get rid of the -3 on the left hand side of the equation. This can be done by adding 3 to both sides of the equat...

RC
Answered by Rosie C. Maths tutor
4165 Views

Solve the simultaneous equations y=x-5 and 10y=2x+6 by elimination, and by substitution.

Elimination:

Multiply equation (eqn) 1 by 2: 2y=2x-10

Subtract modified eqn 1 from 2: 8y=16

Divide through by 8

JR
Answered by Jack R. Maths tutor
3304 Views

what does a value shared in the ratio 2:3 mean?

this means that there are 5 parts to share out altogether. (2+3=5) So you take the value you wish to share and divide it by 5. once you've divided the value by five, to share in the ratio 2:3 simply means...

ET
Answered by Ewan-James T. Maths tutor
67989 Views

4x-y=3 and 3x-2y=1. Solve these simultaneous equations to find values for x and y.

Equation 1: 4x-y=3  Equation 2: 3x-2y=1

We have to find a common multiple between 4 and 3 so that both equations have the same first value. This means that we can get rid of the x by subtracting th...

JH
Answered by Jami H. Maths tutor
10707 Views

There are 31 days in January. January 21st 2015 was a Wednesday. What day of the week was February 8th 2015?

First we need to know how many days are still remaining before the end of January. In this case it would be 10 since 31-21=10. We know that 8th of February  is the 8th day of the month, so in total betwee...

RD
Answered by Roman D. Maths tutor
6521 Views

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