butternutsquash1 butternutsquash1
  • 22-03-2017
  • Mathematics
contestada

I need to know the answer and how to solve

I need to know the answer and how to solve class=

Respuesta :

kjb16
kjb16 kjb16
  • 22-03-2017
First multiply the first row by 3:
-21x + 3y = -57
-2x + 3y + -19
Subtract those:
-19x = -38
Solve for x:
-19x = -38
/-19
x = 2

Then substitute x = 2 into either one.
-21(2) + 3y = -57
Solve for y:
-42 + 3y = -57
Regroup:
3y - 42 = -57
+42
3y = -15
/3
y = -5
Answer Link

Otras preguntas

What is the slope of the line between (3, -4) and (-2, 1)?
what is the area of a figure with vertices(1,1), (8,1) , and (5,5)?
is basil a herb or a shrub?
find the correct sum of these geometric series.. *a1=343, an=-1, r= -1/7 *a1=80, n=7, r= -1/2 *a1= 3, a8=384, r=2 Please help me with these problems.. :(
Why do some countries have to adopt more than one standard time ?
Fill in the blank : 1. Earth rotates from ______________ to ________________.
write an equation of the line that passes through the given points:   there are four questions:   1) (0,-1);(6,8)   2) (3,1);(9,7)   3) (1,2);(10,14)   4) (0,0)
cos A/1-tan A + sin A/1-cot A =sin A + cos A
Identify the domain and rangewith steps please (picture below)
In the poem the inchcape rock tell the character of sir ralph which is present in every human being