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Dericktopsom
22.11.2019 •
Mathematics
On which of the following lines does the point (7, 1) lie?
y = −x + 8
y = x − 10
y = −4x + 3
y = 5x + 4
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Ответ:
i need more info
Ответ:
x=5,y=3
Step-by-step explanation:
the first step is to decide whether you want to substitute y and find x, or substitute x and find y.
(it doesn't matter which way you will choose.If you do the math correctly you will get the correct answer,one way or another).
for example, let's substitute y into the first equation:
x=17-4*(x-2)
so now,we will organize the equation:
x+4x=17+8
5x=25/(÷5)
x=5
now we will substitute x with 5 in the second equation(or the first one,it doesn't matter)in order to find y:
y=5-2
y=3