Respuesta:
27x+7y=151
20x+12y=180
y= 151-27x
7
20x+12.(151-27x)= 180
20x+ 1812 - 324x = 180
7. 7
20x-324/7x= 180-1812/7
-184/7x= -552/7
x= -552/7:(-184/7)
x= 3
y= 151-27.3/7
y= 151-81/7
y= 70/7
y= 10
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Verified answer
Respuesta:
27x+7y=151
20x+12y=180
y= 151-27x
7
20x+12.(151-27x)= 180
7
20x+ 1812 - 324x = 180
7. 7
20x-324/7x= 180-1812/7
-184/7x= -552/7
x= -552/7:(-184/7)
x= 3
y= 151-27.3/7
y= 151-81/7
y= 70/7
y= 10