7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十3x=88 (50一2x)÷2=12

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7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十3x=88 (50一2x)÷2=12
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7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十3x=88 (50一2x)÷2=12
7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十
7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十3x=88 (50一2x)÷2=12

7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十7(x一3.6)=5.6 (x+2.8)÷2.5=10 3(x一2.7)=12 4x7十3x=88 (50一2x)÷2=12