Question

plz solve it fast

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Answer 1

Answer:

$a + b = 8 \\ c - d = 6 \\ a + c = 13 \\ b + d = 8 \\ then \: first \: we \: add \: c \: + b = 14 \\ then \: second \: we \: subtract \: c - b \: = 5 \\ then \: we \: add \: both \: \: c \: + b = 14\\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: c - b = 5 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 2c = 19 \\ so \: c = \frac{19}{2} \\ d = \frac{19}{2} - d = 6 \\ so \: d \: = \frac{7}{2} \\ a = 13 - \frac{19}{2} = \frac{7}{2} \\ so \: a \: = \frac{7}{2} \\ b = 8 - \frac{7}{2} = \frac{9}{2} \\ so \: b \: = \frac{9}{2} \\ \\ so \: a \: = \frac{7}{2} \\ b = \frac{9}{2} \\ c = \frac{19}{2} \\ d = \frac{7}{2}$

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Answer 2

Answer:

a+b = 8

c-d= 6

a+c= 13

b+c=8