lathwkuster
08.01.2020 •
Mathematics
Solve each system by substitution
-5x+3y=22
8x-2y=-24
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Ответ:
x= -2
y=4
Step-by-step explanation:
-5x+3y=22 I
8x-2y=-24 II
From second equation exp. y and return it in to first equation
y=(24+8x)/2
y=12+4x
-5x+3(12+4x)=22
-5x+36+12x=22
7x=-14
x= -2
y=12+4*(-2)
y=12-8
y=4
Ответ: