Question

59x + 12y = 972 3x + 3y = 900 metodo de sustitucion

Answer 1

1)59x+12y=972
2)3x+3y=900 /×-4
3)-12×-12y=-3600

(1)-(3)-> 47x=4572
x=4572/47
5)x=97.3

(5) en (2)
3 (97.3)+3y=900
3y= 900 - 291.9
y=202.7