решить систему уравнений 7x-3y = -2;-8x +y =12. Created by irinanelidova. algebra-ru

решить систему уравнений 7x-3y = -2;-8x +y =12...

July 2022 1 12 Report

решить систему уравнений
7x-3y = -2;
-8x +y =12

Answers & Comments

зайчёёёнок 7x-3y = -2;
-8x +y =12

7x+2=3y
-8x-12=-y |:(-1)

7x+2=3y
8x+12=y

7x+2=3*(8x+12)
7x+2=24x+36
7x-24x=36-2
-17x=34
x=-2

y=8*(-2)+12
y=-16+12
y=-4

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