16.计算(-$\frac{6}{29}$)×$\frac{4}{5}$+$\frac{20}{29}$×(-$\frac{4}{5}$)-$\frac{1}{5}$×$\frac{12}{29}$.
14.下列方程的变形,正确的是( )
0 284189 284197 284203 284207 284213 284215 284219 284225 284227 284233 284239 284243 284245 284249 284255 284257 284263 284267 284269 284273 284275 284279 284281 284283 284284 284285 284287 284288 284289 284291 284293 284297 284299 284303 284305 284309 284315 284317 284323 284327 284329 284333 284339 284345 284347 284353 284357 284359 284365 284369 284375 284383 366461
| A. | 由7-x=13,得x=13-7 | B. | 由5x=4x+8,得5x-4x=8 | ||
| C. | 由$\frac{1}{2}$x=1,得x=$\frac{1}{2}$ | D. | 由7x+6=5x,得7x-5x=6 |