Question

3x+2y=11,2x+3y=4 in linear equation in two variable (graph and solution)

Answer 1

Answer:

3x+2y=11-------------(1)

2x+3y=4-------------(2)

add eq (1) and (2)

3x+2y=11-------------(1)

2x+3y=4-------------(2)

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5x+5y=15

multiple both the side by 5 we get

x+y=3------------(3)

subtract eq (1) and (2)

3x+2y=11-------------(1)

2x+3y=4-------------(2)

- - -

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x-y=7---------(4)

add eq (3) and (4)

x+y=3------------(3)

x-y=7---------(4)

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2x=-4

x=-4/2

x=-2

put x=-2 in eq(2)

2x+3y=4-------------(2)

2×-2+3y=4

-4+3y=4

3y=4+4

3y=8

y=8/3