Are you ready for the brain teaser? Here it comes. You need to move two matches to correct the equation. Do you have a ...

The 18 is outside the bracket so remains as 18. The equation is now 3𝒙 + 15 = 18 The solution is 𝒙 = 1. When 𝒙 is 1 then the value inside the brackets is 6. Multiply the value outside the ...

This book provides an introduction to the theory and application of the solution of differential equations using symmetries, a technique of great value in mathematics and the physical sciences. In ...

An equation with two unknown values will have infinitely many solutions. or \(x=100\), \(y=-90\), etc. But you can use two equations together, if they have the same two unknowns, to make one ...