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abruzzese [7]
3 years ago
14

How to solve 11x-13y=89 and -11x+13y=107 by substitution

Mathematics
1 answer:
enyata [817]3 years ago
8 0
\left\{\begin{array}{ccc}11x-13y=89&/+13y\\-11x+13y=107&/\cdot(-1)\end{array}\right\\\\\left\{\begin{array}{ccc}11x=13y+89\\11x-13y=-107\end{array}\right\\\\substitute:\\\\(13y+89)-13y=107\\13y-13y+89=107\\89=107-FLASE\\\\Answer:No\ solution\ (x;\ y\in\O)
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