Помогите плз решить линейные уравнения. X-y=-4 2x+5y=6 и второе x+y=8 y+l=5 x+l=3. Created by mirror228. matematika-ru

Помогите плз решить линейные уравнения. X-y=-4 2x+5y=6 и второе x+y=8 y+l=5 x+l...

mirror228 @mirror228

July 2022 1 1 Report

Помогите плз решить линейные уравнения. X-y=-4
2x+5y=6 и второе x+y=8 y+l=5 x+l=3

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Uturna

Verified answer

1. х-у=-4
2х+5у=6;
х=у-4
2(у-4)+5у=6
2у-8+5у=6
7у=14
у=2
х=2-4=-2
2. х+у=8
у+l=5
x+l=3;
x=8-y
l=5-y
8-y+5-y=3
13-2y=3
10=2y
y=5
x=8-5=3
l=5-5=0
Ответ: х=3, у=5, l=0

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