Rozwiąż równiania :
1) 2x+3/5 = 2-x/3 - x
2) x+1/2 - x-1/3 = 1/4
3) 4x+7/2 - 5x-1/6 = x+5
4) x+5/4 - 2x+1/8 = 1/2 ( 2-x)
Te zadanie jest na stronie 199 zadanie 11 MATEMATYKA Z PLUSEM 1 GIM.
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1] 2x+3/5=2-x/3-x /*15
30x+6=30-5x-x
30x+5x+x=30-6
36x=24 /:36
x=24/36 /:6
x=4/6
x=2/3
2] x+1/2-x-1/3=1/4 /*12
12x+6-12x-4=3
12x-12x=3-6+4
0x=1 /:0
x=0
3] 4x+7/2-5x-1/6=x+5 /*6
24x+21-30x-1=6x+30
24x-30x-6x=30-21+1
-12x=10 /:-12
x= -10/12
x= -5/6
4] x+5/4-2x+1/8=1/2[2-x]
x+5/4-2x+1/8=1-1/2x /*8
8x+10-16x+1=8-4x
8x-16x+4x=8-10-1
-4x= -3 /:-4
x=3/4
2x+9/15 =2-5x/15 -x/*15
30x+5x+15x=30-9
50x=21/:50
x=2,4
2) x-x=1/4-1/2+1/3
0=3/12-6/12+4/12
0=1/12/:0
x=0
3)4x-5x-x=5-7/2+1/6
-2x=5-3 3/6+1/6
-2x=10/6/:(-2)
x=-5/6
4)x+5/4-2x+1/8=1-1/2x
x-2x+1/2x=1-5/4-1/8
-1/2x=1-10/8-1/8
-1/2x=1-1 2/8-1/8
-1/2x=-3/8/:(-1/2)
x=3/4