SOLUTION: 2s - 13t = 120 -14s + 91t= -840 How to solve by substitution or elimination

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Question 369544: 2s - 13t = 120
-14s + 91t= -840
How to solve by substitution or elimination
Answer by Alan3354(69443) About Me  (Show Source):
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2s - 13t = 120
-14s + 91t= -840
How to solve by substitution or elimination
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Multiply the 1st eqn by 7
14s - 91t = 840
-14s + 91t= -840
The 2nd eqn is -1 times the first.
--> dependent
infinite # of solutions.
In essence, 2 versions of the same equation