解方程.x+2.8=4.8 42+x=58 x-6=48 x-解方程.x+2.8=4.8 42+x=58 x-6=48 x-3.5=6.5 x-4.2=3.8 1.5+x=19

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解方程.x+2.8=4.8 42+x=58 x-6=48 x-解方程.x+2.8=4.8 42+x=58 x-6=48 x-3.5=6.5 x-4.2=3.8 1.5+x=19

解方程.x+2.8=4.8 42+x=58 x-6=48 x-解方程.x+2.8=4.8 42+x=58 x-6=48 x-3.5=6.5 x-4.2=3.8 1.5+x=19
解方程.x+2.8=4.8 42+x=58 x-6=48 x-
解方程.x+2.8=4.8 42+x=58 x-6=48 x-3.5=6.5 x-4.2=3.8 1.5+x=19

解方程.x+2.8=4.8 42+x=58 x-6=48 x-解方程.x+2.8=4.8 42+x=58 x-6=48 x-3.5=6.5 x-4.2=3.8 1.5+x=19