√2x/5-√2x-3.6/5=0.2 这道题怎么计算得出x?

x5
√2x-5√2x-3.6=1
-4√2x=4.6
x=

去分母合并同类项得 -4√2x=4.6
√2x=-1.15
x=-115√2/200

√2x/5-√2x-3.6/5=0.2
4√2x/5-3.6/5=0.2
4√2x-3.6=0.2 *5=1
4√2x=1+3.6=4.6
x=4.6/(4√2)=0.8132

说明：不好意思，抄楼上的。
√2x/5-√2x-3.6/5=0.2
-4√2x/5-3.6/5=0.2
-4√2x-3.6=0.2 *5=1
-4√2x=1+3.6=4.6
x=-4.6/(4√2)=-0.8132