mathematicatagprotected我懂啥米意思看图我要怎么输入才可以解方程In[11]:=Solve[{3x+2y=15,3x-3y=12},{x,y}]DuringevaluationofIn[11]:=Set::write:TagPlusin3x+2yisProtected.>>DuringevaluationofIn[11]:=Set::

Question

mathematica tag protected
我懂啥米意思
看图我要怎么输入才可以解方程
In[11]:= Solve[{3 x + 2 y = 15,3 x - 3 y = 12},{x,y}]
During evaluation of In[11]:= Set::write:Tag Plus in 3 x+2 y is Protected.>>
During evaluation of In[11]:= Set::write:Tag Plus in 3 x-3 y is Protected.>>
During evaluation of In[11]:= Solve::naqs:15&&12 is not a quantified system of equations and inequalities.>>
Out[11]= Solve[{15,12},{x,y}]
为什么错了 图无法上传

Answer 1

正确的语句是Solve[{3 x + 2 y == 15, 3 x - 3 y == 12}, {x, y}]
Mathematica里等于号是==
=是赋值号