решите линейное уравнение: срочнооо. {(x-y)/2+(x+y)/3=1 {(x-y)/3+(x+y)/4=1. Created by BIGBANG11. algebra-ru

4=1...

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решите линейное уравнение: срочнооо. {(x-y)/2+(x+y)/3=1 {(x-y)/3+(x+y)/4=1

ВладимирБ

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Решение смотри на фото

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koingrel

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(х - у)/2 + (х+у)/3 = 1 |*6
(х - у)/3 + (х+у)/4 = 1 |*12

3х - 3у + 2х + 2у = 6
4х - 4у + 3х + 3у = 12

5х - у = 6
7х - у = 12 |*(-1)

5х - у = 6
+
-7х + у = -12
______
-2х = -6
х = 3

х = 3
5*3 - у = 6

х = 3
у = 9

Ответ: (3;9)

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