Question

12(x+2y)-8(2x+y)=2(5x-6y)
20(x-4y)=-10 por el método de igualación

Answer 1

12(x+2y) -8(2x+y)= 2(5x -6y) 20(x-4y)=-10
12x +24y -16x-8y = 10x -12y 20x -8y= 10
12x-16x -10x+24y-8y+12y
-14x+28y

x=-28y/-14 x= (-10 +8y)/20
20(28 y)= 14(-10 -8y )
560 y = 140 + 112 y
560y - 112 y = 140
448 y = 140
y = 140/448
y = 35/112
y =- 5/ 16
x= -28y/ -14
x = - 28 (-5/16)/-14
× = -5/8