sarahlamar382
sarahlamar382
03-12-2014
Mathematics
contestada
3x+4y=2 4x-4y=12 elimination
Respuesta :
Wenqian
Wenqian
03-12-2014
3x+4y=2
+ 4x-4y=12 add them since 4y and -4y can cancel out
7x=14 divide each side by 7
x=2
3x+4y=2 x=2
3(2)+4y=2 substitute
6+4y=2
-6 -6
4y=-4 divide each side by 4
y=-1
Answer Link
ritz
ritz
03-12-2014
3x+4y=2
4x-4y=12
Add both
7x=14
X=2
Substitute value of x in first equation
Y=-1
Answer Link
VER TODAS LAS RESPUESTAS ( 13+ )
Otras preguntas
TODOROKI PICS!!!!!!!!!!!!!!!!!!
Which of the following lists of ordered pairs is a function? A. (2,4),(0,2),(2,-4),(5,3) B. (1,6),(2,7),(4,9),(0,5) C. (1,2),(1,-2),(3,2),(3,4) D. (0,2),(2,3),
What fraction of an hour is 39 minutes in its simplest form
H is the midpoint of KL. K(-3,-4);L(9,2); find the coordinates of H.
một ô tô chuyển động nhanh dần đều.Sau 10s vận tốc của xe tăng từ 2m/s lên 6m/s.Tính gia tốc của ô tô
What factors determine whether a molecular collision produces a reaction?
b In a hostel. 50 students have food enough for 54 days. How many students should be added in de the hostel so that the food is enough for only 45 days?
I WILL GIVE THE CROWNDescribe a time when your parents or a teacher seemed like a tyrant (no names)
write an equation of the line that passes through each points (5,6) (3.4)
What coordinates of 3 points lie on y = 2x+3
