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Mathematics
3 January, 22:04
9x - 7y = - 28
7y - 9x = 28
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Helen Rice
3 January, 22:23
0
Substitution or Elimination
Step-by-step explanation:
Substitution: x = - 28/9 + 7y/9
Elimination: x=x, y=4+9x/7
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