A student is trying to solve the system of two equations given below:
Equation P: y + z = 6
Equation Q: 5y + 9z = 1
Which of the following is a possible step used in eliminating the y-term?
(y + z = 6) ⋅ 9
(y + z = 6) ⋅ −5
(5y + 9z = 1) ⋅ 9
(5y + 9z = 1) ⋅ 5

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please help me

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## More answers

- geerky42

You want to eliminate y terms, so you would want coefficient of y to be same, so you can just subtract equations there, right?

- anonymous

I was thinking B or C

- anonymous

alisurfcat i gave you a medal

- geerky42

So for first equation, coefficient of y is 1. In second equation, it is 5.
So you want to multiply first equation by 5 so you can subtract. (Or -5 then add)

- geerky42

Right?

- anonymous

she right

- anonymous

I think so, so it will be B?

- anonymous

yes

- anonymous

thanks

- anonymous

your welcome

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