解方程（要写出过程）和解答（也要写出过程）（问题在问题补充中）(1)2x-1/3=-x/3+2(2)3-3(x-2/3)=-14(3)3(6x-5)-4(x+2)=5(x-2)-x(4)2(2y+1)²-8(y+4)(y-4)=3解答题［(x-1)²］+(2x-1)(2x+1)-4x］÷3x［4（x-2)+12(

Question

解方程（要写出过程）和解答（也要写出过程）（问题在问题补充中）
(1)2x-1/3=-x/3+2 (2)3-3(x-2/3)=-14 (3)3(6x-5)-4(x+2)=5(x-2)-x
(4)2(2y+1)²-8(y+4)(y-4)=3
解答题［(x-1)²］+(2x-1)(2x+1)-4x］÷3x
［4（x-2)+12(x+2)(x-2)-8(x-2)-8(x-2)(x-1)］÷4(x-2)
(1/2a^4x²-1/3a³x²-3/4a³x^4)÷(-2/3a²)
［(x+2y)(x-2y)-(2x-y)²+(3x-y)(2x-5y)］÷(-1/3x)
(-a8)(a²)²÷a³
求值(a+2)²-(a+1)(a-1),其中a=2/3
(-37)-(-17)+26-17+(+37)+(-9)
15×(-9又18/19)+150
-5(a²-2)+4a-8+6(a²-2a)
x²-2(x²-xy+y²)+(-x²+3xy+2y²)

Answer 1

(1)2x-1/3=-x/3+2
6x-1=-x+6
7x=7
x=1
(2)3-3(x-2/3)=-14
3-3x+2=-14
3x=19
x=19/3
(3)3(6x-5)-4(x+2)=5(x-2)-x
18x-15-4x-8=5x-10-x
10x=13
x=1.3
(4)2(2y+1)²-8(y+4)(y-4)=3
2(4y^2+4y+1)-8y^2+128=3
8y+2+128=3
8y=127
y=127/8
解答题
［(x-1)²］+(2x-1)(2x+1)-4x］÷3x
=[x^2-2x+1+4x^2-1-4x]/(3x)
=[5x^2-6x]/(3x)
=[5x-6]/3
=5x/3-2
［4（x-2)+12(x+2)(x-2)-8(x-2)-8(x-2)(x-1)］÷4(x-2)
=[1+3(x+2)-2(x-1)]
=x+9
求值(a+2)²-(a+1)(a-1),其中a=2/3
(a+2)^2-(a+1)(a-1)
=a^2+4a+4-a^2+1
=4a+5
=4*2/3+5
=7又2/3
(-37)-(-17)+26-17+(+37)+(-9)
=26-9
=17
15×(-9又18/19)+150
=-15*9-15*18/19+150
=-135-270/19+150
=15-14又4/19
= 5/19
-5(a²-2)+4a-8+6(a²-2a)
=-5a^2+10+4a-8+6a^2-12a
=a^2-8a+2
x²-2(x²-xy+y²)+(-x²+3xy+2y²)
=x^2-2x^2+2xy-2y^2-x^2+3xy+2y^2
=-2x^2+5xy