Question

решите ривняння 8(х-2 1\4)=9

Answer 1

$8(x-2\frac{1}{4})=9\\8(x-\frac{9}{4})=9\\8x-18=9\\8x=9+18\\8x=27\\x=\frac{27}{8}=3\frac{3}{8}=3,375$

Answer 2

Ответ:

8(х-2 1\4)=9

2 1/4=2×4+1/4=9/4

8(х-9/4)=9

8х-8×(9/4)=9

8х-2×9/1=9

8х-18=9

8х=27

х=27/8

х=3 3/8