Question

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

4x + 9y = 59
x + y = 17

What number should the equation x + y = 17 be multiplied by to eliminate y?

Answer 1

you have 9y in the first equation
- so what should we multiply equation 2 by?

Answer 2

we have y in the second equation and we want it to be 9y

Answer 3

-9 @welshfella

Answer 4

that correct
- so when you add the equations the y will be eliminated

Answer 5

you could also multiply by 9 and subtract but its not usually recommended as subtracting , especially if there are negative terms, is not so easy

Answer 6

thank you so much @welshfella

Answer 7

yw