Question

Determine o valor de x na figura:
C)
a
4
2x+1
5x-1
8
C
S
r

Answer 1

$\sf{\dfrac{4}{8}=\dfrac{2x+1}{5x-1}}\\\sf{20x-4=16x+8}\\\sf{20x-16x=8+4}\\\sf{4x=12}\\\sf{x=\dfrac{12}{4}}\\\huge\boxed{\boxed{\boxed{\boxed{\sf{x=3}}}}}$