Fernando3230 Fernando3230
  • 02-06-2018
  • Mathematics
contestada

Cuanto es (2x+2y=20) (-2x-6y=-52) con método de igualación y método de suma y resta

Respuesta :

vidalmari6p99qfk
vidalmari6p99qfk vidalmari6p99qfk
  • 02-06-2018

x =2       y =8

2x + 2y=20

2x=20-2y

x=10-y

Ahora len la otra ecuacion remplazamos x por (10-y)

-2(10-y)-6y=-52

-20+2y-6y=-52

2y-6y= -32 (-52+20= -32)

-4y=-32

-y=-8

y=8            x=10-y  x=2

2*2+2*8=20

4+16=20

-2*2-6*8= -52

-4-48= -52


Answer Link

Otras preguntas

Ben and carla covington plan to buy a condominium. they will obtain a $220,000, 30-year mortgage at 5 percent. their annual property taxes are expected to be $1
What similarities and differences are there between the animal cell, the plant cell, and the green algae cells? Use complete sentences.
Read the sentence from “Fish Cheeks.” What terrible disappointment would he feel upon seeing not a roasted turkey and sweet potatoes, but Chinese food? The de
Which equation represents a direct proportion a. y = x-2 b. y = x +2 c. y = 2÷x D. y = 2x
how do microbes maintain homeostasis a. by causing disease b. by recycling matter c. by causing fish kills d. by signaling hibernation
Please help me with these 3 answers! 10 points!!!!
samantha has an older brother. right now, he is twice her age. but 8 years ago, her brother was 3 times her age. how old is each person now
step by step answer for 59.6 ÷ 4
Explain and illustrate the notation for distinguishing between the different p orbitals in a sublevel.
Is it possible to express angular speed in degrees per second? if so, what's the conversion factor from radians per second?