Question 1136639
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Adding equations (2) and (4) gives you a+b+c+d=13; comparing that to equation (1) gives you e=8.  Then that with equation (5) gives you d=1.<br>
Adding equations (2) and (5) gives you a+b+d+e=15; comparing that to equation (1) gives you c=6.  Then that with equation (3) gives you b=4; and then that with equation (2) gives you a=2.<br>
ANSWER: a=2; b=4; c=6; d=1; e=8