Question

4x-3y=1 &5x-7y=-2 elimination method​

Answer 1

4x - 3y = 1 ______(1)

5x - 7y = -2 ______(2)

now multiply equation (1) with 5 and multiply equation (2) with 4

we get,

20x - 15y = 5 ________(3)

20x - 28y = -8 ________(4)

now substract equation (4) from equation (3)

we get

20x - 15y = 5

20x - 28y = -8

- + +

_______________

0x + 13y = 13

now

13y = 13

y = 1

now

put the value of y = 1 in equation (1)

4x - 3(1) = 1

4x -3 = 1

4x = 4

x = 1

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