Question

5x+7y=18
3x-5y=20


hallar: "xy"


7x+5y=11
3x+y=7

hallar: "y"elevadoa" x"

Answer 1

espero que te sea útil

Answer 2

X = (18-7y)/5

X=(20+5y)/3

Igualando
(18-7y)*3=(20+5y)*5
54-21y=100+25y
-46=46y
Y=-1

X=(18-7(-1))/5
X=25/5
X=5

X*Y=5*-1=-5

7x+5y=11
3x+y=7

X=(11-5y)/7

X=(7-y)/3

Igualando
(11-5y)*3=(7-y)*7
33-15y=49-7y
-8y=16
Y=-2

X=(11-5(-2))/7
X=21/7
X=3

Y elevado a la x
(-2)^3= - 8