solve 3a+2b+5c=15,7a-3b+2c=52,5a+b-4c=2
Answers
Answer:
a=4, b=-6, c=3
Step-by-step explanation:
3a+2b+5c=15 ----- (i) 23a+19c = 149 --------- (iv)
7a-3b+2c=52 ------ (ii) 22a-10c = 58 ---------- (v)
(i)*3 and (ii)*2 (iv)*10 and (v)*19
9a+6b+15c=45 230a+190c=1490
14a-6b+4c=104 418a-190c=1102
+ +
23a+19c=149 648a = 2592
7a-3b+2c=52 ------ (ii) a = 4.
5a+b-4c=2 ------ (iii) So, 92 + 19c = 149
(iii)*3 c = 3.
7a-3b+2c=52 12+2b+15=15
15a+3b-12c=6 b = -6.
+
22a-10c=58