Question

2x/3+x=2×(x-1) resolução

Answer 1

$\frac{2x}{3+x} = 2(x-1)$

$\frac{2x}{3+x} = 2x-2)$

2x = (2x-2)(3+x)

2x = 6x + 2x² -6 -2x

2x² + 2x - 6 = 0
Δ = b²-4(a)(c)
Δ = 4² - 4(2)(-6)
Δ = 16 + 48
Δ = 64

x = $\frac{-b +- \sqrt{\Delta}}{2(a)}$

x¹ = $\frac{-4 + 8}{2*2}$ = 1

x² = $\frac{-4 - 8}{2*2}$ = -4

Espero ter ajudado =D