Simultaneous equations

There are 55 NRICH Mathematical resources connected to Simultaneous equations

problem

Building Tetrahedra

Age

14 to 16

Challenge level

Can you make a tetrahedron whose faces all have the same perimeter?

$Overturning fracsum$

problem

Overturning fracsum

Age

16 to 18

Challenge level

Can you solve the system of equations to find the values of x, y and z?

problem

Real(ly) numbers

Age

16 to 18

Challenge level

If x, y and z are real numbers such that: x + y + z = 5 and xy + yz + zx = 3. What is the largest value that any of the numbers can have?

article

A Method of Defining Coefficients in the Equations of Chemical Reactions

A simple method of defining the coefficients in the equations of chemical reactions with the help of a system of linear algebraic equations.

problem

The Simple Life

Age

11 to 14

Challenge level

The answer is $5x+8y$... What was the question?