解方程:300x+150(50-x)+200(42-x)+150(x-2)=1600

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解方程:300x+150(50-x)+200(42-x)+150(x-2)=1600
解方程:300x+150(50-x)+200(42-x)+150(x-2)=1600

解方程:300x+150(50-x)+200(42-x)+150(x-2)=1600
300x+7500-150x+8400-200x+150x-300=1600
100x+15600=1600
100x=-14000
x=-140

化简方程,得
6x+3(50-x)+4(42-x)+3(x-2)=32
6x+150-3x+168-4x+3x-6=32
2x=-180
x=-90

错了吧
右边应该是16000
300x+150(50-x)+200(42-x)+150(x-2)=16000
300x+7500-150x+8400-200x+150x-300=16000
100x+15600=16000
100x=400
x=4

同爱小心超人XD
300x+7500-150x+8400-200x+150x-300=1600
300x-150x-200x+150x+7500+8400-300=1600
100x+15600=1600
100x=1600-15600
100x=-14000
x=(-14000)÷100
x=-140