becky1301
11.06.2021 •
Mathematics
Use the diagram to determine which equation can be used to find m DEF.
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Ответ:
y = x - 1 (2)
From here, in order to eliminate one variable, we can subtract (1) from (2)
(2) - (1):
x - 1 - (-2x + 8) = y - y = 0
x - 1 + 2x - 8 = 0
3x - 9 = 0
3x = 9
x = 3
Substituting x back into y:
y = 3 - 1 = 2
Thus, x = 3, y = 2
Or: (3, 2)