z następujących wzorów wylicz x :
a) (a+b)*x=b+c
b) ax-c=bx+ac
c) x+5/3 = x/2
d) 15/2x -7 = 4/x
e) 3/5-3x = -5/2x-3
siemka;) a więc to bedzie tak:
a)(b+c)/(a+b)=x
b)(bx+ac+c)/a=x
c)x=-10/3
d)x=15/11
a) (a+b)*x=b+c /:a+b
x= (b+c):(a+b)
b) ax - c = bx +ac
ax - bx = c + ac
x(a-b)= c(1+a) /:a-b
x= [c(1+a)]:(a-b)
c) x+5/3 = x/2 /*2
2x + 10/3 = x
2x - x = -10/3
x= -10/3
x= -3 i 1/3
d) 15/2x - 7 = 4/x
15/2x - 4/x = 7
15/2x - 8/2x = 7
7/2x = 7 /*2x
7 = 14x /:14
x= 1/2
e) 3/5 - 3x = -5/2x - 3
5/2x - 3x = -3 - 3/5
5/2x - 6/2x = -3 - 3/5
-1/2x = - 18/5 /*-1/2
x= -18/5 * -1/2
x= 18/10
x= 1,8
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siemka;) a więc to bedzie tak:
a)(b+c)/(a+b)=x
b)(bx+ac+c)/a=x
c)x=-10/3
d)x=15/11
a) (a+b)*x=b+c /:a+b
x= (b+c):(a+b)
b) ax - c = bx +ac
ax - bx = c + ac
x(a-b)= c(1+a) /:a-b
x= [c(1+a)]:(a-b)
c) x+5/3 = x/2 /*2
2x + 10/3 = x
2x - x = -10/3
x= -10/3
x= -3 i 1/3
d) 15/2x - 7 = 4/x
15/2x - 4/x = 7
15/2x - 8/2x = 7
7/2x = 7 /*2x
7 = 14x /:14
x= 1/2
e) 3/5 - 3x = -5/2x - 3
5/2x - 3x = -3 - 3/5
5/2x - 6/2x = -3 - 3/5
-1/2x = - 18/5 /*-1/2
x= -18/5 * -1/2
x= 18/10
x= 1,8