Question

use the method substitution to solveeach other of the pair of simulataneous equation ×+y=15,×_y=3​

Answer 1

I hope it will help you from my answer.☺

Answer 2

Answer:

Hey mate ✌️✌️

Step-by-step explanation:

$x + y = 15 \: \: eq(1)$

$x - y = 3 \: \: eq(2)$

From EQ (1)

$x = 15 - y \: \: eq(3)$

Substituting X = 15 - y in eq (2)

$x - y = 3$

$(15 - y) - y = 3$

$15 - 2y = 3$

$- 2y = 3 - 15$

$- 2y = - 12$

$y = 6$

Using y = 6 in eq (3)

$x = 15 - 6$

$x = 9$