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12括号x减三括号等于24

12+( )X3=24( )X3=12填4

3(x-12)=213x-36=213x=21+363x=57x=57÷3x=19

0.3括号x加1.2括号等于24解方程0.3(x+1.2)=24 解:0.3x+0.36=240.3x=23.64 x=78.8

x-2/5x-(1/3x-12)=24 x-2/5x-1/3x+12=2415/15x-6/15x-5/15x=24-12 4/15x=12 x=12/4*15 x=45

8x的平方减括号2x减3括号括号4x加2括号等于14 解:8x^2-(2x-3)(4x+2)=148x^2-(8x^2+4x-12x-6)=148x^2-8x^2+8x+6=148x=8 x=1

13乘括号x减25等于三括号x加25 解:13*(x-25)=3x+2513x-13*25=3x+2513x-3x=13*25+2510x=14*25 x=350÷10 x=35

12(x-2)=24x-2=2x=4

X+3(X-4)=12解:X+3X-12=124X-12=124X=12+124X=24X=24÷4X=6

12除以括号x减0.3等于4,x等于多少12/(x-0.3)=4 x-0.3=12/4 x=3+0.3 x=3.3

12-3(9-x)=5(x-4)-7(7-x) 12-27+3x=5x-20-49+7x 3x-5x-7x=-20-49+27-12 -9x=-54 x=(-54)÷(-9) x=6

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