Top answers

When given an equation with both letters and numbers on each side of the equals sign, for instance 4x +3 = 5x - 3, how do you know what to do first?

With equations like this the most important thing is that you end up with all the numbers on one hand side and all the letters on the other side. People often think there is a 'right' and 'wrong' order to do...
SK
Answered by Sophie K. • Maths tutor
3506 Views

Solve these simultaneous equations: 2x + y = 7, and 3x - y = 8. Do so by 1) Eliminating an Unknown and 2) Substitution.

The number 'in front of' an unknown is called the Coefficient. When eliminating an unknown, look to see whether the coefficients of x are the same in both equations, or if the coefficients of y are the same....
EH
Answered by Ellie H. • Maths tutor
3905 Views

Complete the square and find the roots (where y=0) of: "x^2+4x-5"

completing the square: (x+2)^2-9 finding the roots: (x+2)^2=9 x+2=+/-3 at y= 0, x= -5 or 1
LQ
Answered by Liam Q. • Maths tutor
4634 Views

Expand and simplify (-2x+3)(x-6)

(-2x+3)(x-6)= -2x^2+12x+3x-18= -2x^2+15x-18
BC
Answered by Beth C. • Maths tutor
5374 Views

Increase £190 by 25%

There are two ways to work out the answer to this question. The first way involves first working out 25% of £190 and then adding this to your original £190. To calculate 25% of £190 we multiply 190 by 0.25 a...
JF
Answered by Juliet F. • Maths tutor
8328 Views