А) х-у=5 х+у=11 Б) 5х+2у=3 2х+3у=-1. Created by goooll. algebra-ru

А) х-у=5 х+у=11 Б) 5х+2у=3 2х+3у=-1...

July 2022 1 9 Report

А) х-у=5
х+у=11

Б) 5х+2у=3
2х+3у=-1

Answers & Comments

Rodjik А) x-y=5
x+y=11
x=y+5
y+5+y=11
2y+5=11
2y=6
y=3 , x-3=5 , x=8

Б) 5x+2y=3
2x+3y=-1
x=3-2y/5
2(3-2y/5)+3y=-1
6-4y/5+3y=-1
6-4y+15Y=-5
6+11y=-5
y=-1 , 5x+2(-1)=3 , x=1

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