Предмет: Математика, автор: sssssnastia

Помогите решить уравнение 1) 10-9y=70-6y 2) 60-11n=20-10n 3) 7z+40=3z

Ответы

Автор ответа: triolana
0
10-9у=70-6у
6у-9у=70-10
--3у=60
у=60:(-3)
у=-20
=======================
60-11n=20-10n
10n-11n=20-60
-1n=-40
n=-40:(-1)
n=40
=====================
7z+40=3z
7z-3z=-40
4z=-40
z=-40:4
z=-10
Автор ответа: diomovak
0
1) 10-9у=70-6у
-9у+6у=70-10
-3у=60
у=60÷(-3)
у=-20

2) 60-11n=20-10n
-11n+10n=20-60
-1n=-40
n=-40÷(-1)
n=40

3) 7z+40=3z
7z-3z=-40
4z=-40
z=-40÷4
z= -10
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