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(5x一12)x8=24

(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 解: 5x-12=24÷8 5x-12=3 5x=15 x=3

(5x-12)x8=24 移项可得:5x-12=24÷8=3 再移项可得:5x=3+12=15 解得:x=3

(5x-12)X8=24 40x-96=24 40x=96+24 40x=120 x=3

题目中的式子可以化简,可以利用乘法规则就可以求出结果 (5x-12)*8 =5x*8-12*8 =40x-96

(5x-12)=24÷8=3 5x=3+12=15 x=15÷5=3 检验:如果x=3,则(5×3-12)×8=24

(5x+3)x8=24 40x+24=24 40x=24-24 40x=0 x=0÷40 x=0

40x-96=2 40x=98 x=2.45

(5x+3)X8二24 解: 5x+3=24÷8 5x+3=3 5x=3-3 5x=0 x=0

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