Question

等式-2分之1x=0.5,将等式两边同乘以____.得x=-1,根据是____;

Answer 1

等式-2分之1x=0.5,将等式两边同乘以__-2__.得x=-1,根据是__等式两边同时乘以（或除以）相同的数,原等式不变__;