Question

VA ROG AJUTATIMA VA DAU 95 de PUNCTE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
FACETI EX 4

Answer 1

Răspuns:

sper ca te-am ajutat un pic:)

Answer 2

Răspuns:

x=2

y=3

Explicație pas cu pas:

$\left \{ {{\frac{2x+3y-7}{2}}=\frac{4x+5y-8}{5} \atop {\frac{3x-2y+6}{3} =\frac{5x-4y+10}{4} }} \right. \\\\ \\\left \{ {{10x+15y-35=8x+10y-16} \atop {12x-8y+24=15x-12y+30}} \right. \\\\\left \{ {{10x-8x+15y-10y=35-16} \atop {15x-12x-12y+8y=24-30}} \right. \\ \\ \\\left \{ {{2x+5y=19} \atop {3x-4y=-6}} \right. \\ \\\left \{ {{6x+15y=57} \atop {6x-8y=-12}} \right.\\------------------(-)/ + 23y=69\\y=69:23\\\boxed{y=3}\\\\2x+5*3=19\\2x+15=19\\2x=4\\\boxed{x=2}$