Jordan wants to solve the following system using the elimination method:

2x + 3y = 10
x + y = 7

What number should the equation x + y = 7 be multiplied by to eliminate y? (4 points)

–2
2
–3
3

Question

Jordan wants to solve the following system using the elimination method:

2x + 3y = 10
x + y = 7

What number should the equation x + y = 7 be multiplied by to eliminate y? (4 points)
  
  
 –2 
 2 
 –3 
 3

kropot72 · Answer

If you want to create an equation that has y eliminated, you need to make the coefficient of y in the equation x + y = 7 the same as the coefficient of y in the equation 2x + 3y = 10.

kropot72 · Answer

What is the coefficient of y in the equation 2x + 3y = 10?

anonymous · Answer

3 right?

kropot72 · Answer

Good work! 3 is correct. Therefore if you multiply each term in the equation x + y = 7 by 3, the coefficient of y will become the same as the coefficient of y in the equation 2x + 3y = 10.

anonymous · Answer

Thank you that helped a lot !

kropot72 · Answer

You're welcome :)