Question

Help Please

Answer 1

A system of equations is shown below:

-3x + 7y = -16
-9x + 5y = 16

Part A: Create an equivalent system of equations by replacing one equation with the sum of that equation and a multiple of the other. Show the steps to do this.

Part B: Show that the equivalent system has the same solution as the original system of equations.

Answer 2

@triciaal hey can you help me please

Answer 3

so you need to solve by elimination.

Answer 4

OK so how do we do that.

Answer 5

the objective is to pick a variable and make the coefficient equal and opposite so that when you add the equations the sum of that variable is zero as in eliminated.
you now have one equation with one variable. solve.
use this value in either of the originals to get the value of the other.

Answer 6

so wait if this is elimination we would add them

Answer 7

i will walk you through this time

Answer 8

to get the x then use the x to get the y

Answer 9

pick a variable

Answer 10

x

Answer 11

so to make the coefficients equal and opposite multiply the first eqn by - 3

Answer 12

ok so that would look something like this 9x+7y=48

Answer 13

am i right?