Question

решити уравнение x+2x+3x=840

Answer 1

х+2х+3х=840

6х=840

х=840:6

х=140

проверка

140+2*140+3*140=840

140+280+420=840

840=840

 

 

Answer 2

Х+2Х+3Х=840

6Х=840

Х=840:6

Х= 140