aly02
22.01.2021 •
Mathematics
When solving this system of equations using linear combination, what should you do first?
-x+y=-1
2x+y=19
Multiply the first equation by 2
Add the two equations together
solve the first equation for y
multiply the first equation by 1
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Ответ:
the board is 56 inches long.
how i did this was
12 * 4 = 48
48 + 8 = 56
hope this helps :)