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- 5 ( - 28 - 3y/ 2 ) - 2y = 23
+ 140 + 15y / 2 - 2y = 23 multiplicamos todo por 2 ( para eliminar el denominador )
140 + 15y - 4y = 46
15y - 4y = 46 - 140
11y = - 94
y = - 94/11
Sustituimos para calcular "x"
x = -28 - 3 ( - 94/11 ) / 2
x = - 28 + 282/11 / 2
x = - 308 + 282 / 11 / 2
x = - 26/11 / 2/1
x = ( -26)(1) / (11)(2)
x = -26/22
x = - 13/11
Las soluciones del sistema son :
x = - 13/11
y = - 94/11