Question

Solve : 2x –y = 3, 3x + y = 7 by substitution method. ​

Answer 1

Answer:

x = 2

y = 1

Step-by-step explanation:

2x - y = 3 → (1)

3x + y = 7 → (2)

(2) →→ y = 7 - 3x → (3)

Substitute (3) in (1)

(1) →→ 2x - 7 + 3x = 3

5x = 10

x = 2

Sub x = 2 in (1) or (2) or (3)

(3) →→ y = 7 - 6

y = 1

Answer 2

❥︎$\huge\underline\bold\red{AnswEr}$

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• $= > x = 2$
• $= > y =1$

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❥︎$\huge\underline\bold\</strong><strong>p</strong><strong>i</strong><strong>n</strong><strong>k</strong><strong>{</strong><strong>Solu</strong><strong>Tion</strong><strong>}$

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$= > 2x - y = 3.....1)$

$= > 3x + y = 7......2)$

adding equation 1 and 2 ....

2x - y = 3

+

3x + y = 7

5x. = 10

x = 10/5

x = 2

$= > x = 2$

substituting x = 2 in equation 1)

$= > 2x - y = 3$

$= > 2 \times 2 - y = 3$

$= > 4 - y = 3$

$= > - y = 3 - 4$

$= > - y = - 1$

$= > y = 1$

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