# How do you solve #y=3x-9# and #2y-6x=-18# using substitution?

##### 1 Answer

Jul 17, 2017

**First you regroup them (so that substitution is easier)**

**Name the equations (again for easier substitution)**

**Sub**#color(blue)1# in#color(red)2#

**Then solve**

As you may have realised, those simultaenous equations are undefined. Try checking if you got any errors while copying this question.

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