obicz równania:
a) 4(x-2)-2(x-4)=5(x+1)-3x
b) 7(y+3)=5y+2+2y
c) 1/5(y-3)-2/3(y-3/5)+1/3+2/5-1/3(2y-3)
a] 4[x-2]-2[x-4]=5[x+1]-3x 4x-8-2x+8=5x+5-3x 4x-2x-5x+3x=5+8-8 0x=5 /:0 x=0b] 7[y+3]=5y+2+2y 7y+21=5y+2+2y 7y-5y-2y=2-21 0y= -19 /:0 y=0c] 1/5[y-3]-2/3[y-3/5]+1/3+2/5-1/3[2y-3] 1/5y-3/5-2/3y+6/15+1/3+2/5-2/3y+1 /*15 3y-9-10y+6+5+6-10y+15 3y-10y-10y= -15+9-6-5-6 -17y= -23 /:-17 y=1 6/17
nie wiem czy to ostatnie jest dobrze bo nie napisalas nigdzie =
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a] 4[x-2]-2[x-4]=5[x+1]-3x
4x-8-2x+8=5x+5-3x
4x-2x-5x+3x=5+8-8
0x=5 /:0
x=0
b] 7[y+3]=5y+2+2y
7y+21=5y+2+2y
7y-5y-2y=2-21
0y= -19 /:0
y=0
c] 1/5[y-3]-2/3[y-3/5]+1/3+2/5-1/3[2y-3]
1/5y-3/5-2/3y+6/15+1/3+2/5-2/3y+1 /*15
3y-9-10y+6+5+6-10y+15
3y-10y-10y= -15+9-6-5-6
-17y= -23 /:-17
y=1 6/17
nie wiem czy to ostatnie jest dobrze bo nie napisalas nigdzie =