(6x-12)(8x+5)=(4x-3)(6x-12)求x
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(6x-12)(8x+5)=(4x-3)(6x-12)求x
(6x-12)(8x+5)=(4x-3)(6x-12)求x
(6x-12)(8x+5)=(4x-3)(6x-12)求x
(6x-12)(8x+5)=(4x-3)(6x-12)
(6x-12)(8x+5)-(4x-3)(6x-12)=0
(6x-12)[(8x+5)-(4x-3)]=0
6(x-2)(8x+5-4x+3)=0
6(x-2)(4x+8)=0
24(x-2)(x+2)=0
(x-2)(x+2)=0
x=2或x=-2
9x-7x=20-8
2x=12
x=6
;15x16=5x+80
5x=240-80
5x=160
x=32
;80+x=(52-x)乘3
80+x=156-3x
4x=76
x=19
;8x+5(25-x)=155
8x+125-5x=155
3x=155-125
3x=30
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9x-7x=20-8
2x=12
x=6
;15x16=5x+80
5x=240-80
5x=160
x=32
;80+x=(52-x)乘3
80+x=156-3x
4x=76
x=19
;8x+5(25-x)=155
8x+125-5x=155
3x=155-125
3x=30
x=10
;2(6+x)=4(12-2x)
12+2x=48-8x
2x+8x=48-12
10x=36
x=3.6
0.5+0.3乘(1000-x)=420
0.5+300-0.3x=420
0.3x=300.5-420
0.3x=-119.5
x=-1195/3
;0.3乘(x-2)=2-0.7(-2)
0.3x-0.6=2+1.4
0.3x=2.4+0.6
0.3x=3
x=10
;4x-3(20-x)=6x-7(9-x)
4x-60+3x=6x-63+7x
6x=63-60
6x=3
x=1/2
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