stacy62202
stacy62202
12-05-2016
Mathematics
contestada
3x + 7y =47
-4x +7y =19
Respuesta :
JonathanHagen
JonathanHagen
24-11-2016
3x+7y=47
-1(-4x+7y=19)
Distribute the -1 and add the equations together...you'll get:
7x=28
x=4
Plug X=4 back in...
12+7y=47
7y=35
y=5
Answer Link
VER TODAS LAS RESPUESTAS ( 97+ )
Otras preguntas
How to balance this equation KClO4 → KCl + ?O2(g) and what type of reaction occurs?
Which formula can be used to describe the sequence?
The pun nett square is for a test cross of two mice That were purebred
why is social media a problem to today’s society for teenagers ? speech (detailed) HELP
Which statement BEST describes the philosophy of Sir Robert Filmer? A. Kings derive their power from the consent of their subjects. B. Kings have a divine right
NEED THIS ASAP :) What is the length of the y-component of the vector plotted below? A. 3 B. 4 C. 1 D. 2
How were Southern plantations able to meet the demand for more cotton in the 1800s?
If the half-life of a radioactive substances is 590 million years and you have 40 atoms of it, how many half-lives will have passed when 5 atoms remain
What type of reaction occurs? S(s) + O2 (g) → SO2(g)
How many solutions will each system of equations have? y=-2x+5 and 2x + y = -7
