Answer:
x = 7
Step-by-step explanation:
given [tex]\frac{3}{5}[/tex] = [tex]\frac{6}{x+3}[/tex] ( cross-multiply )
3(x + 3) = 30 ( divide both sides by 3 )
x + 3 = 10 ( subtract 3 from both sides )
x = 7
and [tex]\frac{3}{5}[/tex] = [tex]\frac{6}{10}[/tex] ← check
