Question

3x+x:2+x=45
Aflati pe x

Answer 1

3 x + x / 2 + x = 45

4 x + x / 2 = 45

8 x + x = 2 × 45

9 x = 90

x = 90 : 9  ⇒   x = 10

Verific:    3 × 10 + 10 : 2 + 10 = 45

Answer 2

$3x + x : 2 + x = 45 \\ \\ \frac{9x}{2} = 45 \\ \\ 9x = 45 \times 2 = 90 \\ \\ x = \frac{90}{9} = 10$