Question

Solve: 3x + y = 15
2x - y = 5 by elimination method ​

Answer 1

Answer:

$x = 4 \\ y = 3$

Step-by-step explanation:

$3x + y = 15 \\ 2x - y = 5$

ADDING BOTH THE EQUATIONS

$3x + y - y + 2x = 20 \\ 5x = 20 \\ x = 4$

SUBSTITUTE X=4 IN EQUATION 1

(IT CAN ALSO BE SUBSTITUTED IN EQUATION 2)

$3 \times 4 + y = 15 \\ y = 15 - 12 \\ y = 3$

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