14(2x-3)-5(x+4)=2(3x+5)+5x 9(3x-7)+3(8x-11)=3(9x+8) - вопрос №49564321423542355937381139867111361421 от Астар 19.05.2020 16:12

Question

Математика: 14(2x-3)-5(x+4)=2(3x+5)+5x 9(3x-7)+3(8x-11)=3(9x+8) 6(7x-11)-13(x-6)=14(2x+1)

Астар · Answer

14(2х-3)-5(х+4)=2(3х+5)+5х28х-42-5х-20=6х+10+5х23х-62=11х+1023х-11х=10+6212х=72х=72:12х=69(3х-7)+3(8х-11)=3(9х+8)27х-63+24х-33=27х+2451х-96=27х+2451х-27х=24+9624х=120х=56(7х-11)-13(х-6)=14(2х+1)42х-66-13х+78=28х+1429х+12=28х+1429х-28х=14-12х=2...