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05.01.2021 •
Mathematics
Solve the system by substitution. 9x+y= 9x+y= \,\,21 21 -x-3= −x−3= \,\,y y
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Ответ:
(0,-4)
Step-by-step explanation:
4x-2y=8
y=-4-3x
4x-2(-4-3x)=8
x=0
y=-4-3x0
y=-4