Question

Sudhakar dancer
$the pair of equations 3x - 4y + 9 = 0 and 8x - 8y + 7 = 0 has$
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Answer 1

Step-by-step explanation:

Question:

3x - 4y + 9 = 0

8x - 8y + 7 = 0

Solution:

3x - 4y + 9 = 0 ] x 2 —(i)

8x - 8y + 7 = 0 —(ii)

6x - 8y + 18 = 0

8x - 8y + 7 = 0

(-) (+) (-)

-2x +11 = 0

-2x = -11

x = -11/-2

x = 11/2

Put (x = 11/2) in equation (i)

3x - 4y + 9 = 0

3*11/2 - 4y + 9 = 0

3*11/2 - 4y = -9

33-8y/2 = -9

33 - 8y = -9*2

-8y = -18 -33

-8y = -51

y = -51/-8

y = 51/8

Verification:

let's take equation 1

3x - 4y + 9 = 0

3*11/2 - 4*51/8 +9 = 0

3*11/2 - 4*51/8 = -9

33/2 - 51/2 = -9

(-18/2) = -9

-9 = -9

HOPE THIS MAY HELP YOU