SOLUTION: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction? 3x- y=7 2x+7y=42

SOLUTION: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction? 3x- y=7 2x+7y=42

Algebra.Com

Question 258069: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?
3x- y=7
2x+7y=42
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
multiply the first by 7 so you can add them.
multiply by -7 to subtract them
multiply the first by 2 and the second by 3 to subtract
RELATED QUESTIONS
what multiplier should be used for each of the following equations to eliminate one... (answered by venugopalramana)

What multiplier should be used for each of the following equations to eliminate one... (answered by checkley71)

what multiplier should be used for each of the following equations to eliminate one... (answered by checkley77)

what multiplier should be used for each of the following equations to eliminate one... (answered by jim_thompson5910)

I'm having trouble with this.....Thank you... What multiplier should be used for each (answered by checkley71)

what multiplier should be used for each of the following equations to eliminate one... (answered by edjones)

the substitution method should be used to solve which system of equations a.5x-7y=16 (answered by Edwin McCravy)

Solve the following equations. 1) 2x = 7x + 2 2x - 7x = 7x - 7x + 2 -5x = 2 x =... (answered by KnightOwlTutor,Fombitz)

Using solving by elimination, what are the possible numbers you could multiply the... (answered by math_helper,MathTherapy)