Top answers

How do I solve an algebraic expression when the unknown is on both sides of the equals sign?

the basic idea is to get everything with the unknown (let's assume this is x) on one side of the equals and everything else on the other side. To do this we use the 'inverse idea' to move our items onto diff...
CR
Answered by Coral R. • Maths tutor
3842 Views

Solve the simultaneous equations: 6x +2y = 2 and 12x - 3y = 18

6x + 2y = 2 and 12x -3y =18 Start by multiplying the first equation by two in order to balance both equations to have equal numbers of x 12x + 4y = 4 and 12x - 3y = 18 Rearrange both equations so that the x ...
JH
Answered by Jack H. • Maths tutor
3886 Views

Solve x2 +2x – 4 = 0, leaving your answer in simplest surd form (4 marks, non calculator question)

'Simplest surd form' is a clue that quadratic factorising will not work for this question, so we must instead use the quadratic formula. It is always a good idea to quote this as marks are often available fo...
FO
Answered by Fiona O. • Maths tutor
16560 Views

Solve these simultaneous equations: 2x + 5y = 37 and y = 11 - 2x

Simultaneous equation questions look very intimidating because not only are there 2 equations to solve but there is 2 variables in each! To start with, we're going to make the equations look less confusing b...
BR
Answered by Bethany R. • Maths tutor
6496 Views

Find the roots of x^2+5x+4=0

(x+4)(x+1)=0 x=-1 x=-4
CD
Answered by Christian D. • Maths tutor
3809 Views