Question

x-12y=17
7x-6y=47


es una ecuacion lineal por igualacion

Answer 1

x-12y=17
x = 17 +12 y .................(1)


7x-6y=47 
7x = 47 +6y
x =(47+6y)/7 ......................(2)


Por igualacion
17 +12 y = (47+6y)/7 
(17+12y)*7 = 47 +6y
119 + 84y = 47 +6y
84 y - 6y = 47 -119
78y = -  72
y = -72/78
y = - 12/13


Hallamos x
x-12y=17
x - 12(-12/13) = 17
x + 144/13 = 17
x = 17 - 144/13
x = (17*13 -144)/13
x = (221 -144)/13
x = 77/13