The sum of the left side of these two equations is equal to the same of the right side is these two equations
4x+8y + (-4x+2y) = 20 + 30
10y =50 ( x is eliminated)
y=5
Take this into the second equation
-4x +2y = 30
-4x + 2*5 = 30
x=-5
So x=-5
y=5
Answer:
I-
Step-by-step explanation:
Um okay.
Answer:
5.1304 x 10^14
Step-by-step explanation:
there is 10 zeros behind the decimal point plus 4 other decimal places
in a scientific notation the number has to be less then 10 but more then 1
Answer:
Step-by-step explanation:
First let's multiply the 1st equation by 10.
So, we can see that the equations have the same coefficients and that implies they are equal.
So the equation has no solutions for. 
Answer:
-6
Step-by-step explanation: dont know, did math. this is the answer on edge
