paulmendozasam00 paulmendozasam00

12-01-2020
Mathematics

contestada

solve the simultaneous equation using substitution method x-y=8 and 4x+y=4

Respuesta :

darkspeed darkspeed

12-01-2020

x - y = 8

Add y to both sides

x = 8 + y

4x + y = 4

Substitute the value of x from the first equation in

4(8 + y) + y = 4

Simplify and solve

32 + 4y + y = 4

32 + 5y = 4

5y = -28

y = -5.6

Now put that value of y into the first equation

x = 8 + (-5.6)

x = 2.4

Answer Link

Otras preguntas

The perimeter of a parallelogram is 46in. If the length of one side is 14in., what is the length of a side adjacent to it?

If, 2=5 3=10 4=17 5=??

Why is it necessary to use the same restriction enzyme to cut 2 pieces of DNA that are to be joined together?

Why is it necessary to use the same restriction enzyme to cut 2 pieces of DNA that are to be joined together?

of the400 doctors who attended a conference, 240 practiced family medicine and 130 were from countries outside the United States. One-third of the family medici

Eleni is n years old. In thirteen years she will be twenty four years old-

Eleni is n years old. In thirteen years she will be twenty four years old-

round this number 3.899 to the nearest hundredth

How are radioactive probes useful in DNA fingerprinting

If, 2=5 3=10 4=17 5=??