Предмет: Математика, автор: Yurasas667

помогите решырь уравнение (5x+8)-(8x+14)=9 плис

Ответы

Автор ответа: nurec

(5x+8)-(8x+14)=9
5х-8х+8-14=9
-3х-6=9
-3х=15
х=-5
_______________
(5*(-5) +8) -(8*(-5) +14) = 9
(-25+8) - (-40+14) = 9
-17 - (- 26) = 9
- 17 +26 = 9
9 = 9

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