Question

afla numarul necunoscut: x+4 supra 5 +2=58 supra 13

Answer 1

$\dfrac{x+4}{5+2}$=$\dfrac{58}{13}$

$\dfrac{x+4}{7}$=$\dfrac{58}{13}$

x+4=$\dfrac{7\cdot 58}{13}$

x+4=$\dfrac{406}{13}$

x=$\dfrac{406}{13}$-4

x=$\dfrac{406-52}{13}$

x=$\dfrac{354}{13}$
=>x=28