Question

Fie reactia echiunitara 2x+1 supra 5 .
Atunci x la a 3 a = ??

Answer 1

$\frac{2x + 1}{5} \: echiunitara = > 2x + 1 = 5$

$2x + 1 = 5$

$2x = 5 - 1$

$2x = 4 \: | \div 2$

$x = 2$

${x}^{3} = {2}^{3} = 8$