1) 9(х+6)=72 2) 23(х-12)=552 3) 15(2х+11)=285 - вопрос №84059691967222312552315211285471234749 от Andrey785 03.01.2022 04:13

Question

Математика: 1) 9(х+6)=72 2) 23(х-12)=552 3) 15(2х+11)=285 4) 7(123-4х)=749 решить

Andrey785 · Answer

9(х+6)=729х+54=729х=72-549х=18х=18:9х=223(х-12)=55223х-276=55223х=552+27623х=828х=828:23х=3615(2х+11)=28530х+165=28530х=285-16530х=120х=120:30х=47(123-4х)=749861-28х=74928х=861-74928х=112х=112:28х=4...