解方程2X-(X+3(X-5)=75

问题描述:

解方程2X-(X+3(X-5)=75

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2X-[X+3(X-5)]=75
2X-(X+3X-15)=75
2X-4X+15=75
-2X+15=75
2X=15-75
2X=-60
X=-30

2x-(x+3x-15)=75
2x-x-3x+15=75
-2x=75-15
-2x=60
x=-30

2X-(X+3(X-5))=75
2X-(X+3X-15)=75
2X-(4X-15)=75
2X-4X+15=75
-2X=60
X=-30

2x-(4x-15)=75
2x-4x+15=75
-2x=60
x=-30