90-(180-x)=0.4x
3个回答
90=0.4x+180-x
90=180-0.6x
0.6x=180-90
0.6x=90
x=150
相关问题
90/X+180=60/X-180
90(x-180)=60(x+180) 求x
解方程:180-X+(90-X)=180
60X-X-90=180
(sin(180°+2x))/(1+cos2x)*(cos2x0/(cos(90°+x))=
计算:180-x=5(90-x)
180-X÷90-X=3
(90°-x)+(180°-x)过程,急.
90-x+180-x=136的答案
sin(360--x)cos(180+x)cos(90+x)