571234 571234
  • 17-04-2021
  • Mathematics
contestada

solve the linear equations elimination -2x+3y= 7 5x+8y= -2

Respuesta :

samuelonum1
samuelonum1 samuelonum1
  • 22-04-2021

Answer:

x=-2, y= 1

Step-by-step explanation:

Given data

-2x+3y= 7 --------------1

5x+8y= -2--------------2

Multiply 1 by 5 and 2 by 2 and add

-2x+3y= 7   X 5

5x+8y= -2   X 2

-10x+15y= 35  

10x+16y= -4  

0x+31y= 31

31y= 31

y= 31/31

y= 1

put y= 1 in eqn 1

-2x+3y= 7

-2x+3(1)= 7

-2x+3=7

-2x= 7-3

-2x= 4

x=- 4/2

x= -2

Answer Link

Otras preguntas

4a + 3 - 9 = -7 + 2 + a
Why  might  things far away  and  long  ago  be   important   to  us now.
if 4 bags of corn can feed a herd of cows for 6 days, how many bags will feed the herd for 9 days ?
Why  might  things far away  and  long  ago  be   important   to  us now.
Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2. A) y = 1/2 x + 5 B) y = 1/2 x - 3 C) y = 1/2 x - 5 D)
what is a rational number between 1/8 and 1/4?
what can turn igneous rock into sediment?
Why  might  things far away  and  long  ago  be   important   to  us now.
what is a rational number between 1/8 and 1/4?
Why did Spain build mission in the borderlands of New Spain?