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括号x加2.8括号除以三等于3.6列方程解答

(X+2.8)/3=3.6 X+2.8=3.6*3=10.8 X=10.8-2.8=8

3.6=18/5 (1/3+5/12)*3.6 =1/3 * 18/5+5/12 * 18/5 =6/5+3/2 =1.2+1.5 =2.7

x=2

1+2×3×4×5-6-7-8

如图

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