Chapter 7 linear equaTionS 1936.^1
2
683242 1343684
6284()xx()()xxxx
xx−+ += −−+ += −
+= −
− 666
22 4
44
62
6
22
2
3xx
xxxx−
=−
++
===- 576242 3
576128 12
572
2xx x
xxx
xx
x+= −− −
+= −−+
+=−
+ +()()22
770
77
77
7
77
7
1x
xxxx+=
−=−
=−=−=−- 32 5241532
6158 2515 2
2()xx()()x
xxx
x−− +=−+−
−−−=−−−
− −−=−−
++
−=−
++
===17 517
55
31717
17 17
30
3
30
3
0x
xx
xxxx