Question

Please solve this question please

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Answer 1

Answer:

y = -1

x = 2

Step by step explanation:

Given,

3x - 4y = 10 _____(1)

4x + 3y = 5 _____(2)

Multiplying equation (1) by 4

12x - 16y = 40 _____(3)

Multiplying equation (2) by 3

12x + 9y = 15 ______(4)

Subtracting (3) from (4)

(4) - (3) : 25y = - 25

y = -1

Substituting value of y in equation (2)

4x + 3 x (-1) = 5

4x -3 = 5

4x = 5 + 3

4x = 8

x = 2

Hence y = -1 and x = 2

Checking:

(1):

LHS = 3x - 4y

3x(2) - 4(-1)

6 + 4 = 10 = RHS

(2):

LHS = 4x(2) + 3(-1)

8 - 3 = 5 = RHS

Answer 2

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