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(5x–12)x8=24解方程

(5x-12)=3 5x=3+12 5x=15 x=15÷5 x=3

(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)X8=24 5x-12=24÷8 5x=3+12 x=3

原式= 40x-96=24 40x=24+96 40x=120 x=120÷40 x=3

(5x-12)X8=24 解: 5x-12=24÷8 5x-12=3 5x=15 x=3

答案如图

5x-12=3 5x=15 x=3 100-3x=16 3x=84 x=28

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

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