Question

$\frac{x}{3.(3)} + \frac{x}{1.(6)} = 180$

Answer 1

3,(3)=(33-3)/9=30/9=10/3
1,(6)=(16-1)/9=15/9=5/3
x/10/3+x/5/3=180
3/10x+3/5x=180 amplificãm pe 3/5 cu 2
3/10x+6/10x=180
9/10x=180
x=180×10/9
x=200