Social Studies
Social Studies, 24.02.2021 18:20, ddarby

1.x+y=-7 y=x+1
substitution method:

elimination method:

2.x-y=5
x+5y=-7
substitution method:

elimination method:
​
mathematics subject

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1.x+y=-7 y=x+1
substitution method:

elimination method:

2.x-y=5
x...

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