（津南区）解方程或解比例． 3×0.7+4x="6.9" 4：=16：x x﹣17.5="0.5" =．
10-÷×1
325×0.36+6.75×36
5.6×0.375+×5.4-0.375×0.9
5.6x+4x=17.28
x+=
=16：x 
x﹣17.5="0.5" 
=
．
-
÷
×1
×5.4-0.375×0.9
x+
=
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