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5[x -9] =-10
5x-45 = -10
5x = -10+45
5x = 35
x = 35/5
x = 7
5 [X-2]=-10 Se pone -2 porque + por - es igual a -
5 [X-2]=-10
5X-10=-10
5X=-10+10
5X=0
X= 0/5
X=0