What is the best first step to solve the system using elimination?

6x – 5y = 4
9x + y = –17

Question

What is the best first step to solve the system using elimination?

6x – 5y = 4
9x + y = –17

aravindg · Answer

add them

aravindg · Answer

first step multiply 2nd equation with 5 then add

aravindg · Answer

u can solve for x

anonymous · Answer

Yeah. That's what I'd do. You want the coefficient for y to cancel. Or you could choose to cancel the coeffecient for x, but in this case, that is a bit trickier.

hero · Answer

Solve both equations for y, set y = y, then solve for x, then solve for y.

anonymous · Answer

Practice makes a man perfact

anonymous · Answer

6x – 5y -4 = 9x + y +17

anonymous · Answer

6x-5y=4
9x+y=-17 multiply by 5 =>

  6x -5y=4
45x +5y=-85   (now u add them)
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51x  +0    =-81 => x=-81/51=-27/17

6*-27/17-5y=4=> y=46/17