2x+(20-x)4=54怎么解?

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2x+(20-x)4=54怎么解?2x+(20-x)4=54怎么解?2x+(20-x)4=54怎么解?2x+(20-x)4=542x+80-4x=542x-4x=54-80-2x=-26x=132x+

2x+(20-x)4=54怎么解?
2x+(20-x)4=54怎么解?

2x+(20-x)4=54怎么解?
2x+(20-x)4=54
2x+80-4x=54
2x-4x=54-80
-2x=-26
x=13

2x+(20-x)4=54
2x+80-4x=54
2x=26
x=13

2x+(20-x)4=54
2x+80-4x=54
-2x=54-80
-2x=-26
2x=26
x=13