Question

Use the elimination method to solve the system of equations. Choose the
correct ordered pair.
7x+3y= 30
-2x+3y= 3
ОА. (3, 5)
ОВ. (3, 3)
Ос. (6, 5)
D. (6, 3)

Answer 1

B (3,3) is the answer

Explanation:

7x+3y=30
-2+3y=3

Choose a variable to eliminate (We’ll choose Y)

(7x+3y=30) -> 7x+3y=30
(-2x+3y=3) -1 -> 2x+-3y=-3

The -3y camels the other 3y, combine the equations

9x=27

Divide both sides by 9

9x/9 = 27/9
x = 3

Back to 7x+3y= 30
Substitute the x with 3

7(3)+3y= 30
21+3y= 30

Move the constant to the other side

21+3y=30
-21 -21

3y=9

Divide both sides by 3

3y/3 = 9/3

y = 3