Question

2x-7y=5
-3x-4=y
(substituition method)

Answer 1

Answer:

• x= -1
• y=-1

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step by step explanation:

Given:

$2x - 7y = 5 \: \: \: \: \: ....(1) \\ - 3x - 4 = y \: \: \: \: \: ....(2)$

putting value of y in eq.(1)

$= > 2x - 7y = 5 \\ = > 2x - 7( - 3x - 4) = 5 \\ = > 2x + 21x + 28 = 5 \\ = > 23x = 5 - 28 \\ = >23 x = - 23 \\ = > x = \frac{ - 23}{23} \\ x = > - 1$

now,putting value of x in eq.(2)

$= > - 3x - 4 = y \\ = > - 3( - 1) - 4 = y \\ = > 3 - 4 = y \\ y = > - 1$

Hence, the value of x =y= -1.

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hope it is clear!!