Question

Giving brainliest to whoever answers this.

Use the elimination method to solve the system if equations choose the correct ordered pair

7x+4y=39
2x+4y=14

Answer 1

Answer:

5,1

Step-by-step explanation:

7x + 4y = 39

2x + 4y = 14

since, the 4y same for both equation then we can eliminate the 4y by subtracting the two equation

7x + 4y = 39

2x + 4y = 14

---------------- -

5x + 0 = 25

5x = 25

x = 25/5 = 5

then we can input (subtitute) the value of x into the equation, I choose 2x + 4y = 14

2x + 4y = 14

2(5) + 4y = 14

10 + 4y = 14

4y = 14 - 10

4y = 4

y = 4/4 = 1

or if your teacher ask you to use elimination to find the value of x we can write like this

7x + 4y = 39

2x + 4y = 14

make the coeficient of x in both equation same

7x + 4y = 39 (x2)

2x + 4y = 14 (x7)

so

14x + 8y = 78

14x + 28y = 98

--------------------- -

0 - 20y = -20

-20y = -20

y = (-20)/(-20) = 1 (same answer right)

so the correct answe is

(5,1)