3х-(10-9х)=22х 21х+45=15+14х 13х+40=2х+7 25-(7-2х)=5х - вопрос №68821733109222145151413402725725 от masha2820 16.02.2021 18:55

Question

Математика: 3х-(10-9х)=22х 21х+45=15+14х 13х+40=2х+7 25-(7-2х)=5х

masha2820 · Answer

1)3х-(10-9х)=22х3х-10+9х=22х3х+9х-22х=10-10=10хХ=-12)21х+45=15+14х21х-14х=15-457х=-30Х=(-30)/73)13х+40=2х+713х-2х=7-4011х=-33Х=-34)25-(7-2х)=5х25-7+2х=5х25-7=5х-2х18=3хХ=6...