Question

3(m+1.4)-6.4=8m-15*(m-11) это уровнения

Answer 1

3(m+1.4)-6.4=8m-15*(m-11)

3m+4,2-6,4=8m-15m+165

3m-2,2=-7m+165

3m+7m=2,2+165

10m=167,2

m=167,2:10

m=16,72

 

Answer 2

3(m+1.4)-6.4=8m-15*(m-11) 

3m+4.2-6.4=8m-15m+165

3m-8m+15m=165-4.2+6.4

10m=167.2

m=167.2:10

m=16.72

проверка:

3*(16.72+1.4)-6.4=8*16.72-15*16.72-15*11

47.96=47.96