8-4.5 + 5.5 = 10 to solve the equation

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• 19. (13 * 0.58-4087 + 0.42 * 13-5.13) * 4.25
• 20. （ ）0（ ） * （ ）6 --------------------------- （ ）（ ）5（ ） （ ）3（ ） ------------- （ ）6（ ）（ ） （ ）（ ）（ ） * 3 8 ----------------- （ ）（ ）76 11 1（ ） ----------------- （）（）（）（）（） ( )( )5 * 4 ( ) -------------- 3 ( )（ ） （) () () () --------------- 1 2 ( )( )( )