Question 260279
Here is our system:
(i) {{{y=3x-4}}}
(ii) {{{y=3x+4}}}
step 1 - substitute (i) into (ii) to get
(iii) {{{3x-4 = 3x+4}}}
step 2 - subtract 3x to get
(Iv) {{{-4 = 4}}}
since this never happens, we can say no solution.
It is no solution because the two lines, when graphed, will be parallel.