2x+4(50-x)=139-4怎样解过程要详细

问题描述:

2x+4(50-x)=139-4怎样解过程要详细

2X+4(50-X)=139-4
2X+200-4X=135
-2X=-65
所以,X=32.5
明白不?

解2X+200-4X=135
-2X=135-200
-2X=-65
X=32.5

2x+4(50-x)=139-4
2x+200-4x=135
2x-4x=135-200
-2x=-65
x=65/2

2x+200-4x=135
2x-4x=135-200
-2x=-65
x=32.5