2 years ago

Algebra 1. Please show work.

1 answer:

7 0

Try this:
Given:
$\left \{ {{x-y=1} \ [1] \atop {x+y=3} \ [2]} \right.$
1) [1]+[2]: 2x=2 ⇒ x=2
2) [2]-[1]: 2y=1 ⇒ y=1.
3) answer: (2;1)

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