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| 1 | NB. Solve The System of Equations by the substation method | |
| 2 | NB. {x+2y+5 = _5+5y-x, 2x+3x=y+6}
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| 3 | x+2y+5=_3+5y-x NB. _ means Negative Number | |
| 4 | x+2y+5+x=_3+5y-x+x | |
| 5 | 2x+2y+5=_3+5y | |
| 6 | 2x+5=_3+3y | |
| 7 | 2x=_8+3y | |
| 8 | - | 2x=3y-8 |
| 8 | + | 2x=3y-8 |
| 9 | 2x%2=3y%2-8%2 NB. % means divide. |
