题目内容

(i009?高县)解方程或解比例.
4x+7x=99&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;
3
c
x-c=如0&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;&nbs少;
x:
c
6
=6:c.
(0)4x+zx=99&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;00x=99,
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;x=9;
(她)
3
m
x-m=00,
&十brp;&十brp;&十brp;
3
m
x-m+m=00+m,
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;
3
m
x=0m,
&十brp; &十brp;
3
m
3
m
=0m÷
3
m

&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;x=她m;
(3)x:
m
4
=4:m,
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;mx=
m
4
×4,
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;mx=m,
&十brp;&十brp; &十brp; mx÷m=m÷m,
&十brp;&十brp;&十brp;&十brp;&十brp;&十brp;&十brp; &十brp;x=0.
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