? +? =8
+ +
? - ? =6
=13 =8
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Step-by-step explanation:
here is your answer and once try to solve it yourself
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Step-by-step explanation:
suppose a,b,c,d .
a+b=8
c-d=6
a+c=13
b+d=6
simply four equation solve find abcd,
(2&4) above equation
b+c=12
(1&3) above equation
b-c= -5
(5&6) above equation
2b=7
b=3.5, c=8.5 put the above equation 1 &2
a=4.5, d= 2.5
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