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. (6 points)

Part B: Show that the equivalent system has the same solution as the original system of equations. (4 points)

Question

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. (6 points)

Part B: Show that the equivalent system has the same solution as the original system of equations. (4 points)

anonymous · Answer

looks like you just asked this right?

anonymous · Answer

yes

anonymous · Answer

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. 
ok lets multiply the second equation by $2$

anonymous · Answer

$$-3x + 7y = -16 \-9x + 5y = 16$$ becomes $$-3x + 7y = -16 \-18x + 10y = 32$$ then add and get 
$$-21x+17y=16$$

anonymous · Answer

now your new system is 
$$-3x+7y=-16\
-21x+17y=16$$

anonymous · Answer

that is my six points worth
i guess your last job is to solve both systems of equations and see that you get the same answer

anonymous · Answer

ok