Find the choice below which gives a first step in solving the given system of equations by the addition method
6x - 5y = 12
x + y = 3
2006-12-28 15:59:05 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The first step would be to multiply the second equation by 5. The reason why is become we would get
6x - 5y = 12
5x + 5y = 15
Which we can add to eliminate the variable.
11x = 27
2006-12-28 16:05:20 · answer #1 · answered by Puggy 7 · 0⤊ 0⤋
The first step is to multiply one of the equation by a factor that will make the coefficient of either x or y the same. And it does not matter which one is picked; the results will be the same. Usually, I pick the multiplication factor that will lead to an easy calculation.
In this case, it is easier to multiple the 2nd equation by - or +5.
So you get:
-6x -6y = -18 [This allows you to eliminate the x's]
or:
5x +5y = +15 [This allows you to eliminate the y's]
2006-12-29 05:02:37 · answer #2 · answered by Renaud 3 · 0⤊ 0⤋
The first step would be multiplying the second equation by either by 5 or -6.
2006-12-28 16:20:15 · answer #3 · answered by Nick Name 3 · 2⤊ 0⤋