Question

(a+3b=13) (2a+b=1) metodo de sustitucion

Answer 1

(9a-3b+3c)+(-a+b-c)  b (12ab-10bc-8cd) + (7ab+6bc-4cd)  c. (m³-m²-m…

Answer 2

3b=13-a
b=13/3-a/3

2a+(13/3-a/3)=1
2a-a/3=1-13/3
(6a-1a)/3=(3-13)/3
5a/3=-10/3
5a=(-10/3)*3
5a=-10
a=-10/5
a=-2

b=13/3-(-2)/3=15/3=5