Question

the value of x and y are
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Answer 1

Answer

$2x + y = 8...(1) \\ 3y = 4 + 4x \\ 4x - 3y = 4...(2) \\ multiply \: eq \: 1) \: by \: 3 \\ 6x + 3y = 24...(3) \\ add \: eq \: 2) \: and \: 3) \\ 4x - 3y + 4 + 6x + 3y + 24 \\ 10x = 28 \\ x = \frac{28}{10} \\ x = 2.8 \\ put \: x \: = 2.8 \: in \: eq \: 1) \\ 2x + y = 8 \\ 2(2.8) + y = 8 \\ 3.6 + y = 8 \\ y = 8 - 3.6 \\ y = 4.4$

Answer 2

2x + y = 8. ... (1)

–4x + 3y = 4. ...(2)

multiplying equation (1) by 2 , we get

4x + 2y = 16 , now adding bboth equation ,we get

5y = 20

y = 4

putting this value of y in equation (1)

2x + 4 = 8

2x = 4

x = 2