Решите уравнение 5*(0.2-х)=25 -9/14*z+2=2 4/7 - вопрос №2494059502259142247 от irina197505 23.11.2020 17:05

Question

Математика: Решите уравнение 5*(0.2-х)=25 -9/14*z+2=2 4/7

irina197505 · Answer

5 * ( 0.2 - X ) = 25
1 - 5X = 25
5X = 26
X = 5.2

- 9 / 14Z + 2 = 2 4/7
- 9 / 14Z = 2 4/7 - 2
- 9 / 14Z = 4/7
14Z = ( - 9 ) * 4/7
14Z = ( - 36/7 )
Z = ( - 36/7 ) : 14
Z = ( - 36/98 )
Z = ( - 18/49 )