Решить уравнения: 4(2y + 5) = 7y − 9; 2(3 − y) = 3(2y + 7).. Created by Ustailia. algebra-ru

Решить уравнения: 4(2y + 5) = 7y − 9; 2(3 − y) = 3(2y + 7)...

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July 2022 1 4 Report

Решить уравнения:

4(2y + 5) = 7y − 9;
2(3 − y) = 3(2y + 7).

Answers & Comments

mukus13

Verified answer

$1)$

$4(2y + 5) = 7y-9$

$8y+20 = 7y-9$

$8y-7y = -9-20$

$y=-29$

Ответ: $-29$

$2)$

$2(3 -y) = 3(2y + 7)$

$6 -2y =6y+21$

$6y+2y=6-21$

$8y=-15$

$y=-15:8$

$y=-1,875$

Ответ: $-1,875$

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