How do you solve a set of three similatenous equations with three unknown variables?

You should manipulate the equations into a form where you can eliminate a variable, using two of the equations. From here, you should be left with two new equations and two unknown variables. Repeat the same again, manipulating the equations (by this I mean getting the co-efficients of one of the variables the same, and use the rules 'same sign subtract' or 'opposite signs add') to eliminate a variable. Once you have two of the three unknowns, you can plug the numbers back into one of the original equations and compute the last unknown variable.

Answered by Matthew G. Maths tutor

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