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1) 5x +(-12) = 89 - 2x
5x - 12= 89 - 2x
5x + 2x = 89 + 12
7x = 101
x=14.4285...
2) 32y + 158 = 873
32y= 715
y=22,34
5x-12= 89-2x
Propiedad Conmutativa:
5x+2x= 89+12
7x= 101
x= 101/7
32y+158= 873
Propiedad Conmutativa:
32y= 873-158
32y= 715
y= 715/32