把x=5代入方程ax-8=20+a
得：5a-8=20+a，
解得：a=7．
故填7．
已知x=5是方程ax-8=20+a的解，则a=_．
已知x=5是方程ax-8=20+a的解，则a=______．
数学人气：108 ℃时间：2020-02-06 08:50:37
优质解答
我来回答
类似推荐
猜你喜欢
- 1匀变速直线运动的位移与速度的关系的公式是怎么推理出来的?
- 2求顺境中成长比逆境中成长好的事例
- 3Do you know ___Awho is that woman B who that woman is Cwhom is the woman D that woman is
- 4I have never heard of so beautiful music与I have never heard of such beautiful music哪句对
- 5把质量800克，体积1000厘米3的物块浸没到水中．求物块浸没在水中时受到的浮力是多大？
- 6已知关于x,y的方程组已知关于xy的二元一次方程组 ｛x-y=a+3 ｛2x+y=5a
- 7磁通量怎样算正,怎样算负?
- 8当x=-1时,代数式x^3-4x^2-kx-10的值为0,则当x=5时,这个代数式的值是()
- 9where do you have your Music lessons?
- 10{I really do not, I love only you an me and he was just a friend, nothing is}什么意思