" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2a+5b= 7 |x1|2a+5b =7
-3a+b=15 |x5|-15a+5b =75
17a =-68
a= -68/17
a= -4
2a+5b=7
2(-4)+5b=7
-8+5b=7
5b=7+8
5b=15
b=15/5
b=3
a+b
-4+3
-1