livi02
livi02
27-01-2018
Mathematics
contestada
Algebra 1. Please show work.
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evgeniylevi
evgeniylevi
27-01-2018
Try this:
Given:
[tex] \left \{ {{x-y=1} \ [1] \atop {x+y=3} \ [2]} \right. [/tex]
1) [1]+[2]: 2x=2 ⇒ x=2
2) [2]-[1]: 2y=1 ⇒ y=1.
3) answer: (2;1)
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