AleciaCassidy
12.11.2020 •
Mathematics
I confused what answer is it
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Ответ:
A) 3x + 5x - 4 = 1
Step-by-step explanation:
The second equation is y + 4 = 5x. Solve this equation for y by subtracting 4 from both sides. --> y = 5x - 4
Now replace "y" in the first equation with "5x - 4".
3x + y = 1
--> 3x + (5x - 4) = 1