NEED ANSWERED NOW PLEASE!!!! Use this system of equations to answer the questions that follow.
4x – 9y = 7
–2x + 3y = 4
What number would you multiply the second equation by in order to eliminate the x-terms when adding to the first equation?
What number would you multiply the second equation by in order to eliminate the y-terms when adding to the first equation?
Answers
Answer:
2, 3
Step-by-step explanation:
equations become -4x + 6y = 8
and
-6x + 9y = 12
Answer:
2 and 3
Step-by-step explanation:
Linear equation are an important part in mathematics which deals with finding the value of x and y.
So, according to the given equation here:
4x – 9y = 7
–2x + 3y = 4
We have to solve the equation in elimination process. That is we have to multiply a number to the second equation to equal it with first equation's
variables , so that they get cancelled out.
For example, to cancel out x we have to multiply the second equation with 2 to equal it with 4x.
So, 4x-9y =7
-4x+6y =8 [Multiplying it with 2]
__________
-3y=15 [By simple addition]
y= -5
Now, to eliminate y , we have to multiply the second equation with 3 to equal it with 9y.
So, 4x-9y =7
-6x+9y =12 [Multiplying it with 3]
_____________
-2x = 19 [By simple addition]
x= -9.5