Question

solve the following simultaneous equation with the help of elimination method 4×+8y=72. 4×+y=23​

Answer 1

Answer:

4x + 8y = 72 ------- eqn 1.

4x + y = 23 ------- eqn 2.

eliminating y

4x + 8y = 72 × 1

4x + y = 23 × 8

-; I multiplied both sides by the coefficient of y in the above

4x + 8y =72

32x + 8y = 184

4x + 8y =72

- (32x + 8y ) = 184

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

- 28x = - 112

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

- 28 -28

X = 4

put x = 4 into eqn 2

4(2) + y = 23

8 + y = 23

y = 23 - 8

y = 15

Like, Mark as brainlest....

Answer 2

Answer:

(4, 7 )

Step-by-step explanation:

4x + 8y = 72 → (1)

4x + y = 23 → (2)

subtract (2) from (1) term by term to eliminate x

0 + 7y = 49

7y = 49 ( divide both sides by 7 )

y = 7

substitute y = 7 into either of the 2 equations and solve for x

substituting into (1)

4x + 8(7) = 72

4x + 56 = 72 ( subtract 56 from both sides )

4x = 16 ( divide both sides by 4 )

x = 4

solution is (4, 7 )