Ash0405
Ash0405
02-02-2015
Mathematics
contestada
Solve by substitution
X+3y=1 and -3x-3y=-15
Respuesta :
Аноним
Аноним
02-02-2015
[tex]x+3y=1\\ -3x-3y=-15\\ add\quad the\quad equ.\\ (x+3y)+(-3x-3y)=1-15\\ x-3x+3y-3y=-14\\ -2x=-14\\ x=\frac { -14 }{ -2 } \\ x=7\\ Let's\quad rewrite\quad the\quad equ.\\ 7+3y=1\\ 3y=1-7\\ 3y=-6\\ y=\frac { -6 }{ 3 } \\ y=-2[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 91+ )
Otras preguntas
Can someone help me with this math question plsss it would mean alot :D! (LOTS OF POINTS!!!!!!!!!!)
If (0, 4) is on the graph of f(x), what point must be on (4, 0)?
Which of the following is equivalent to sin(3pi/4)
A rectangular piece of platinum has dimensions of 3.50 cm x 2.16 cm x 1.08 cm and weighs 175.5 g. What is the density of platinum? a. 21.37 g/cm³ b. 24.25 g/cm³
PLS HELP!!! Instructions: Find the measurement of the angle indicated in the following parallelogram.
PLEASE HELP ME I'M CONFUSED.
A bowling alley charges x dollars per guest. What is the total cost, y , for 9 guests?
Change 756.2 % to a decimal number.
someone please help ASAP, thank you!
I NEED HELP ASAP PLEASE!!!! I'm having trouble with a math problem can someone help me with this? (100 POINTS!!!)