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

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

In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?a. 2.84 times 10^{-3}b. 5.63 times 10^{-3}c. 7.7 times 10^{-7}d. 12.42 times

jasmines cd collection is 3/8 jazz 1/4 rap and the rest is rock music what is the fraction of rock music

In scientific notation, what is the sum of 2.3 times 10^{-3} and 5.4 times 10^{-4}?a. 2.84 times 10^{-3}b. 5.63 times 10^{-3}c. 7.7 times 10^{-7}d. 12.42 times

find the circumference of a circle whose radius is 15.4cm

find the circumference of a circle whose radius is 15.4cm

All of the following expressions have a value between 0 and 1, excepta. \frac{(-3^{7})}{(-3)^9}b. 4^{-10}× 4^{6}c. \frac{(8^3)^3}{8^{-4}} d. ( \frac{2}{5} ^{8})

find the circumference of a circle whose radius is 15.4cm

find the circumference of a circle whose radius is 15.4cm

What value of x makes the equation true ? 4(2x-4)=16

What value of x makes the equation true ? 4(2x-4)=16