5,6*z-2*z-0,7*z+2,65=7

Question

5,6*z-2*z-0,7*z+2,65=7

Answer 1

5,6z-2z-0,7z+2,65=7

2,9z+2,65=7

2,9z=7-2,65

2,9z=4,35

z=1,5

Ответ 1,5

Answer 2

5.6z-2z-0.7z+2.65=7
2.9z=7-2.65
2.9z=4.35
z=1.5