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? 4 −4 9 −9

we will multiply equation x+y=17 by (-9)

Step-by-step explanation:

Maria has two equations to solve by elimination method:

4x + 9y = 59 ---- (1)

x +y = 17 ----------(2)

To start with elimination method we will multiply equation (2) by (-9) first,

-9x - 9y = -153  -------(3)

Now we will add equation (1) to equation (3)

4x + 9y = 59

-9x - 9y = -153

-5x  = -94

5x = 94

x = 94/5

By putting x = 94/5 in equation (2)

+ y = 17

y = 17 - =

=

Answer :  we will multiply equation x+y=17 by (-9)

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