Answer: The correct answer is A. Addition
Explanation:
Let's solve for x in 2x+4y=10
Step 1: Add -4y to both sides.
2x+4y+−4y=10+−4y
2x=−4y+10
Step 2: Divide both sides by 2.
2x/2 = −4y+10/2
x = −2y +5
Now let's solve for x in 5x+4y = -12
Step 1: Add -4y to both sides.
5x+4y+−4y=−12+−4y
5x=−4y−12
Step 2: Divide both sides by 5.
5x/5 = −4y−12/5
x = −4/5y + −12/5
Here is what solving for Y looks like
Let's solve for y in 2x+4y=10
Step 1: Add -2x to both sides.
2x+4y+−2x=10+−2x
4y=−2x+10
Step 2: Divide both sides by 4.
4y/4 = −2x+10/4
y = −1/2x + 5/2
Now let's solve for y in 5x+4y = -12
Step 1: Add -5x to both sides.
5x+4y+−5x=−12+−5x
4y=−5x−12
Step 2: Divide both sides by 4.
4y/4 = −5x−12/4
y = −5/4 x−3