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48-8x = 0
-8x = -48 //( )-1 todo elevado a menos uno
8x = 48
x = 48/8
2) -4x +30 +3x +10 = 0
-1x +40 = 0
-x = - 40 //( )-1
x = 40
48 =5x + 3x
48=8x
48 ENTRE 8 =X
6 =X