[tex]\sf\dfrac{x}{100}+\dfrac{3}{100}=\dfrac{8}{100}[/tex]
Subtract 3/100 to both sides:
[tex]\sf\dfrac{x}{100}=\dfrac{5}{100}[/tex]
Cross multiply:
[tex]\sf100x=500[/tex]
Divide 100 to both sides:
[tex]\sf~x=5[/tex]
Or we could just multiply both sides of the equation by 100, to give us:
[tex]\sf~x+3=8[/tex]
Subtract 3 to both sides:
[tex]\sf~x=5[/tex]
