初一四道计算题①1-2(y-2)=y-(-3+15y) ②3x-6/6=2(x-3)/5③x- (4x-3)/6= 2-

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初一四道计算题
①1-2(y-2)=y-(-3+15y) ②3x-6/6=2(x-3)/5
③x- (4x-3)/6= 2- (2-3x)/8
④x- (x-3)/3 - (x-7)/2=1
以上四道写出答案~
现在的人真...没话说这么菜

我写好了你选我的把
①1-2(y-2)=y-(-3+15y)
1-2y+4=y+3-15y
-2y-y+15y=3-1-4
12y=-2
y=-1/6
②3x-6/6=2(x-3)/5
3x-1=2/5x-6/5
x=-1/13
③x- (4x-3)/6= 2- (2-3x)/8
x-2/3x+1/2=2-1/4+3/8x
x=-30
④x- (x-3)/3 - (x-7)/2=1
x-1/3x+1-1/2x+7/2=1
x=-21

{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 解二元一次方程.①y=2x-3 3x+2y=8 ②y=x+2 6x+5y=-1 ③3x+5y=11 x+4y=15 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 两道二元一次计算题①｛3x+4y=16 ｛5x-6y=33②｛4（x-y-1）=3（1-y）-2 ｛2分之x+3分之y= 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 ①｛2X-5y=21,②｛2x+y=6,③｛x-3y=1,④｛y=-2x=3 ｛y=-x.｛y=1/2x+1.｛5x-9 3x+2y/4=2x+y/5=x-y+1/6