Question

Pra quem gosta de equação
{2x+5y=125
x-y=10

{x+y=250
2x=3y

{x+y=776
x=3y

{x+2y=125
y=2x
ajuda ai galera vlw
2 ja ta bom

Answer 1

{2x+5y=125
{x-y=10. 5
{2x+5y=125
{5x-5y=50
3x=75
x=75/3
x=25
x-y=10
25-y=10
-y=10-25
-y=-15.(-1)
y=15
{x+y=250 (-2)
{2x=3y
{-2x-2y=-500
{2x=3y
y=-500
-2x-2y=-500
-2x-2.(-500)=-500
-2x+1000=-500
-2x=-500-1000
-2x=-1500.(-1)
2x=1500
x=1500/2
x=750
{x+y=776
x=3y
3y+y=776
4y=776
y=776/4
y=194
x+y= 776
x+194=776
x=776-194
x=582
{x+2y=125
x+2.2x=125
x+4x=125
5x=125
x=125/5
x=25
x+2y=125
25+2y=125
2y=125-25
2y=100
y=100/2
y=50