Помогите плииз!!!! Найдите х 1) (240-2*х):30=7 2) 14-81:х=5 3) (х-3):5=30. Created by SuperMary9. matematika-ru

Помогите плииз!!!! Найдите х 1) (240-2*х):30=7 2) 14-81:х=5 3) (х-3):5=30...

July 2022 2 1 Report

Помогите плииз!!!! Найдите х
1) (240-2*х):30=7
2) 14-81:х=5
3) (х-3):5=30

Shevtsovasa 1) (240-2*х):30=7
   240-2*х=30*7
   240-2*х=210
   2*х=240-210
   2*х=30
   х=30:2
   х=15


2) 14-81:х=5
   81:х=14-5
   81:х=9
   х=81:9
   х=9

3) (х-3):5=30
   х-3=30х5
   х-3=150
   х=150+3
   х=153

1 votes Thanks 2

masta40k 1) (240-2х):30=7,
240-2х=7*30,
2х=240-210,
2х=30,
х=15.
2) 14-81:х=5,
81:х=14-5,
81:х=9,
х=81:9,
х=9.
3) (х-3):5=30,
х-3=30*5,
х-3=150,
х=150+3,
х=153.

1 votes Thanks 1

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