x+x+1+x+7+x+8=416怎么解?
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x+x+1+x+7+x+8=416怎么解?
x+x+1+x+7+x+8=416怎么解?
x+x+1+x+7+x+8=416怎么解?
x+x+1+x+7+x+8=416
(x+x+x+x)+(1+7+8)=416
4x+16=416
4x=416-16
4x=400
x=100
4x+16=416
4x=400
x=100
4x+16=416
4x=400
x=100
4x+16=416
4x=400
x=100