Explain how to form a linear combination to eliminate the variable y for this system.

2x - 3y = 3
5x + 2y = 17
A)
Multiply the first equation by 2 and the second equation by 3.
B)
Multiply the first equation by −5 and the second equation by 2.
C)
Multiply the first equation by −2 and the second equation by 3.
D)
Multiply the first equation by 2 and the second equation by −3.

Question

Explain how to form a linear combination to eliminate the variable y for this system. 

2x - 3y = 3
5x + 2y = 17
A)
Multiply the first equation by 2 and the second equation by 3.	
B)
Multiply the first equation by −5 and the second equation by 2.	
C)
Multiply the first equation by −2 and the second equation by 3.	
D)
Multiply the first equation by 2 and the second equation by −3.

cwrw238 · Answer

the aim is to make the coefficient of y the same ( but different sign) so that adding the 2 equations will eliminate the term in y

anonymous · Answer

ans is a)

friendzone · Answer

@cwrw238  just checking working thanks

cwrw238 · Answer

@aakash_kachhal please dont give direct answers

anonymous · Answer

multiplying first by 2 and second by 3 would give -6y and +6y hence ELIMINATED!!

cwrw238 · Answer

yw

anonymous · Answer

@cwrw238 i will take care of that in future! thanks for ur suggestion...