
求未知数x319×x=7018 1044÷x=29 1256+x=1769x-108=...
求未知数x319×x=70181044÷x=291256+x=1769x-108=21632×(x÷28)=256...
求未知数x319×x=7018 1044÷x=29 1256+x=1769x-108=216 32×(x÷28)=256
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(1)319×x=7018
319×x÷319=7018÷319
x=22;
(2)1044÷x=29
1044÷x×x=29×x
29x÷29=1044÷29
x=36;
(3)1256+x=1769
1256+x-1256=1769-1256
x=513;
(4)x-108=216
x-108+108=216+108
x=324;
(5)32×(x÷28)=256
32×(x÷28)÷32=256÷32
x÷28×28=8×28
x=224.
319×x÷319=7018÷319
x=22;
(2)1044÷x=29
1044÷x×x=29×x
29x÷29=1044÷29
x=36;
(3)1256+x=1769
1256+x-1256=1769-1256
x=513;
(4)x-108=216
x-108+108=216+108
x=324;
(5)32×(x÷28)=256
32×(x÷28)÷32=256÷32
x÷28×28=8×28
x=224.
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