Question

Which of the following would be the best first step to solve the system of equations?

2x – 9y = 6
4x – 3y = –7

A.
Multiply the first equation by 2.
B.
Multiply the second equation by 2.
C.
Multiply the first equation by –3.
D.
Multiply the second equation by –3.

Answer 1

A :D

Answer 2

I'm stuck on this one too, if you can help. :D

What is the first step in solving this system of equations by elimination?

5a + 3b = –9
2a – 5b = –16
A.
Subtract the two equations.
B.
Add the two equations.
C.
Solve for a.
D.
Multiply the first equation by 2 and the second by –5.

Answer 3

because you can eliminate x when you multiplied the 1st eqn with 2
then easily count y later :)

for 2nd one is D
because subtract and addition cannot be used in problem involving simultenous eqn :)

Answer 4

THANK YOU SO MUCH! :)

Answer 5

no problem ;)