Tìm x: a, 461 + ( x-4) = 387 b, 11- ( – 53 + x) = 97 c, -( x+84 ) + 213 = -16 d, 3- ( 17-x) = 289 – ( 36 + 289) e, 25 – ( x+5 ) = 415 – ( 15 – 415)
Tìm x: a, 461 + ( x-4) = 387 b, 11- ( – 53 + x) = 97 c, -( x+84 ) + 213 = -16 d, 3- ( 17-x) = 289 – ( 36 + 289) e, 25 – ( x+5 ) = 415 – ( 15 – 415)