6.8+12÷x=10.8,14-0.5(x+3)=7.8,3.5x-3x-10=8,7.9-5x=7.8÷2
10x-20=6x,10+6x=8x,2(x+54)=8x,25-2x=5+2x
人气:104 ℃ 时间:2020-02-05 23:57:57
解答
6.8+12÷x=10.8,12÷x=4,x=12÷4,x=3; 14-0.5(x+3)=7.8,0.5(x+3)=6.2,x+3=12.4,x=9.4 3.5x-3x-10=8,0.5x=18,x=36 7.9-5x=7.8÷2; 5x=4,x=0.8 10x-20=6x,4x=20,x=5; 10+6x=8x...
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