Question

1) 3x + y = 11 2) x = y-2 2x - 3y = -9 y = 2x + 8


find x and y find x and y

Answer 1

➡️

3x + y = 11

x - y = -2

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4x = 9

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x = 9/4

➡️9/4 - y = -2

y = 9/4 + 2 = 17/4

➡️

2x - 3y = - 9

2x +9y = -8 (-)

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-12y = 1

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y = -1/12

2x + 3(1/12) = 9

2x = 9 - 1/4

x = 35/8