(5-x)*3=(7-x)*2
15-3x=14-2x
x=-1
(5-x)*3=(7-x)*2 x*（1-0.2）=145-x+8 x*6+x（1+0.1）*5=1518 9+x =(
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相关问题
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3≤|8-x| |x+1|>2-x |x+3|7|x+1| x^2-6|x|+9>0 |x-1|+|x+2|≥5
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2.1X+7.9X=6.9 5X+0.8×2=7.12X+5.8=8.2 6X-3×4=1.2
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1.8+x=2 x=?x-7.5=2.5 x=?1.2x=4.8 x=?x/0.5=12 x=?x+1.2=9.6 x=
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1/2x+3=1/3x+2 0.5x-0.7=6.5+0/2x 1-7/3x=2/3x+19 0.4x-1/4=8-1/
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解方程5x-2+1.8=3.6 7（x-1.2）=2.1 9.4x-0.4x=16.2 0.2x-0.4+0.5=3.7
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解方程（1）1.6x-9=3.8（2）7（x-1.2）=2.1（3）x-0.52x=9.6（4）7-2x=5．
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0.2(5x-1)+5(x-1)=0.8 解比例：6(x-1)=7(x-3)
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x:3=7/8:1/49:x=4.5/0.81/6:2/5=1/2:2x3/8:x=5%:0.6
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5(2-x)=-(2x-7) 0.5x-2=0.8(2x-1.5) 2(x+0.5)-3(x-0.4)=5.6
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解方程：⑴4/3-8X=3-11/2X⑵0.5X-0.7=6.5-1.3X⑶1/6(3X-6)=2/5X-3⑷(1-2X