Look at the system of equations shown below.

(a) 3x - 4y = -1
(b) 6x – 3y = 3

Which could be the first steps to solve this system of equations by elimination?

A. Multiply equation (a) by 2, then add the two equations.

B. Multiply equation (a) by -2, then add the two equations.

C. Multiply equation (b) by 4, then add the two equations.

D. Multiply equation (b) by -4, then add the two equations.

Question

Look at the system of equations shown below.

                      (a) 3x - 4y = -1 
                      (b) 6x – 3y = 3 

Which could be the first steps to solve this system of equations by elimination?


A.	Multiply equation (a) by 2, then add the two equations.

B.	Multiply equation (a) by -2, then add the two equations.

C.	Multiply equation (b) by 4, then add the two equations.

D.	Multiply equation (b) by -4, then add the two equations.

anonymous · Answer

letter B  (a) by -2

anonymous · Answer

How'd you come out with A? @nathan_czh 

How'd you get B? @bahupepe

anonymous · Answer

B. Multiply equation (a) by -2, then add the two equations.

anonymous · Answer

|dw:1367379178595:dw|

anonymous · Answer

A. Multiply equation (a) by 2, then add the two equations. **IS NOT RIGHT**

anonymous · Answer

-2 (3x - 4y = -1) -2
 +  6x – 3y = 3 

   -6x+8y=2
+ 6x – 3y = 3 

6x will be cancel,

and the result is 5y=5
threfore y=1

anonymous · Answer

you have to multiply (a) by -2 so that when you add them, the -6x and the +6x cancel out.

anonymous · Answer

Whoops. Didn't see the add