Question

решите уравнение: 7,2х+2х-6=40

Answer 1

7,2х+2х=40+6
9,2х=40+6
9,2х=46
х=5

Answer 2

7,2x+2x-6=40
9,2x=46
x=$\frac{46}{9,2} = \frac{46}{1} : 9 \frac{2}{10} = \frac{46}{1} : \frac{92}{10}= \frac{46}{1} * \frac{10}{92}= \frac{460}{92} = \frac{115}{23} = 5$
x=5