4道方程题,73-3(x-1)=706 2:2(2x-15)=6(4x-9)3.(x-8)÷2=(2x-2)÷3 4:50-7(3-y)=(y+7)+25
人气:320 ℃ 时间:2020-02-05 18:53:28
解答
1:73-3(x-1)=706 73-3x+3=706 -3x=706-76 x=-2102:2(2x-15)=6(4x-9) 4x-30=24x-54 20x=24 x=6/53.(x-8)÷2=(2x-2)÷3 3x-24=4x-4 x=-204:50-7(3-y)=(y+7)+25 50-21+7y=y+32 6y=3 y=1/2
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