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04.12.2020 •
Mathematics
What is the x cordinate of the solution
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Ответ:
x = - 4
Step-by-step explanation:
Given the 2 equations
y = - 2x - 5 → (1)
y = x + 7 → (2)
Substitute y = x + 7 into (1)
x + 7 = - 2x - 5 ( add 2x to both sides )
3x + 7 = - 5 ( subtract 7 from both sides )
3x = - 12 ( divide both sides by 3 )
x = - 4
Ответ: