4x×(1-1/3)×(1-1/3)-7=x+7(解这个方程,
问题描述:
4x×(1-1/3)×(1-1/3)-7=x+7(解这个方程,
答
4x(1-1/3)-7=x+7 4x(2/3)-x=7+7 (7/9)x=14 x=14×9/7=18
4x×(1-1/3)×(1-1/3)-7=x+7(解这个方程,
4x(1-1/3)-7=x+7 4x(2/3)-x=7+7 (7/9)x=14 x=14×9/7=18