16-x=12.5怎么解
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16(x-2)*(x-2)=9(x+3)*(x+3)==>16(x-2)*(x-2)-9(x+3)*(x+3)=0==>[4(x-2)+3(x+3)]*[4(x-2)-3(x+3)]=0==>[7x+
16+X=9/19(36+X)19(16+x)=9(36+x)304+19x=324+9x19x-9x=324-30410x=20x=2
x(16-x)=12016x-x2-120=0一元二次方程
3x+8=5x-165X-3X=16+82X=24X=12
0.75x+0.50(16-x)=10.500.75x+8-0.5x=10.500.25x=10.5-80.25x=2.5x=2.5÷0.25x=10
咳咳这不是方程.这叫等式.等式多项式.10X-128+16X=10X+16X-128=26X-128然后不能解了.这货是未知数--
4+6X(3x-2)=16x4+18x-12=16x18x-16x=12-42x=8x=4
x=7x12.5%+7x2x=7x0.125+7x2x=0.875+14x=14.875
移项得5/8x=90得到x=144
x+12.5x=1813.5x=18x=18÷13.5x=4/3
X-(12.5%X+12.5%X+16)=48.5x-(25%x+16)=48.5x-25%x-16=48.5(1-25%)x=48.5+1675%x=64.5x=64.5÷75%x=86
3x-x=162x=16x=16÷2x=8
(108-x)/x=12.5%108-x=0.125x1.125x=108x=96
0.5x+(20-x)=12.50.5x+20-x=12.5x-0.5x=20-12.50.5x=7.5x=7.5÷0.5x=15
0.25x+0.4x+0.25x+16=xx-0.25x-0.4x-0.25x=160.1x=16x=16÷0.1x=160
12.5x+x=13.5x=10.8x=10.8/13.5所以x=0.8
x+0.36x=161.36x=16x=16/1.36x=200/17x=11.76
5x+12.5x=19.517.5x=19.5x=19.5/17.5x=39/35
3x+x=164x=16x=16÷4x=4