Question

3/10 * x +2 * x = 7

 bài trên là bài tìm x

Answer 1

\(\frac{3}{10}x+2x=7\)

\(\Leftrightarrow\left(\frac{3}{10}+2\right)x=7\)

\(\Leftrightarrow\frac{23}{10}x=7\)

\(\Leftrightarrow x=7\cdot\frac{10}{23}\)

\(\Leftrightarrow x=\frac{70}{23}\)

Answer 2

\(\frac{3}{10}\cdot x+2\cdot x=7\)

\(\left(\frac{3}{10}+2\right)\cdot x=7\)

\(\frac{23}{10}\cdot x=7\)

\(x=7:\frac{23}{10}\)

\(x=\frac{70}{23}\)

Answer 3

\(\frac{3}{10}x+2x=7\)

\(\left(\frac{3}{10}+2\right)x=7\)

\(\frac{23}{10}x=7\)

\(x=7:\frac{23}{10}\)

\(x=\frac{70}{23}\)

Answer 4

3/10 * x + 2 * x = 7

( 3/10 + 2 ) * x = 7

23/10 * x = 7

x = 7 : 23/10

x = 70/23

Answer 5

\(\frac{3}{10}\cdot x+2\cdot x=7\)

\(\left(\frac{3}{10}+2\right)x=7\)

\(\frac{23}{10}x=>\frac{23}{10}\cdot x=7\)

\(x=7:\frac{23}{10}\)

\(x=\frac{70}{23}\)