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(5x–12)x8=24解方程

(5x-12)8=24 (5x-12)8÷8=24÷8 5x-12=3 5x-12+12=3+12 5x=15 5x÷5=15÷5 x=3

(5x-12)×8=24 5x-12=3 5x=15 x=3

5x-12=3 5x=15 x=3

40x+24=24 40x=24-24 40x=0 x=0

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(5×-12)*8=24 5×-12=3 5×=15 ×=3

5×-12=24÷8 5×=3+12 ×=15÷5 ×=3

(5x-7)÷3=5 5x-7=15 5x=22 x=22/5

解: 1、5x-0.5=2.5 5x=2.5+0.5 x=3÷5 x=0.6 2、1.2(x+3.2)=24 x+3.2=24÷1.2 x=20-3.2 x=16.8

(5x12)x8=24

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