Rozwiąż równania:
a) (2x-3) :5 = (2-x):5 - x
b) (x+1) :2 - ( x-1) :3 = 1/4
c) (4x + 7) :2 - (5x-1) :6 =x+5
d) (x+5): 4 - (2x+1) :8 = 1/2 (2-x)
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a) (x-):5=(2-x):5-x
-x:5=-2x:5-x
-x+2x+x=5*5
2x=25/:2
x=12,5
b)(x+1)"2-(x-1):3=1/4
2x:2-2x:3=1/4
2x-2x=1/4 * 2*3
0=1,5
c) (4x+7):2-(5x-1):6= x+5
11x - 4x-x=5*2*6
6x=60/:6
x=10
d)(x+5):4-(2x+1):8=1/2(2-x)
5x:4-3x :8=1/2+x
5x-3x-x=1/2*4*8
x=16
a
(2x-3):5=(2-x):5-x I*5 obje strony mnożymy przez 5
2x-3=2-x-5x
2x+x+5x=2+3
8x=5
x=5/8
b
(x+1):2-(x-1):3=1/4 I*12
6(x+1)-4(x-1)=3
6x+6-4x+4=3
2x=3-10
2x=-7
x=-7/2
x=-3 1/2
c
(4x+7):2-(5x-1):6=x+5 I*6
3(4x+7)-(5x-1)=6(x+5)
12x+21-5x+1=6x+30
7x-6x=30-22
x=8
d
(x+5):4-(2x+1):8=1/2(2-x) I*8
2(x+5)-(2x+1)=4(2-x)
2x+10-2x-1=8-4x
4x=8-9
4x=-1
x=-1/4