Wyznacz x. Proszę o rozwiązanie tych zadań po kolei nie o podanie tylko wyniku.
a) 2x+c=5x-8
2x-5x=-8-c
-3x=-8-c /:(-3)
x=(-8-c)/(-3)
x=(8+c)/3
b) x/2a=c /*2a
x=2ac
c) (x+5)/b=3 /*b
x+5=3b
x=3b-5
d) 7/(x+1)=2 /*(x+1)
7=2(x+1)
7=2x+2
2x=7-2
2x=5 /:2
x=2,5
e) (x+1)/4=2/3
3(x+1)=4*2
3x+3=8
3x=8-3
3x=5 /:3
x=5/3
f) (a+x)/y=1 /*y
a+x=y
x=y-a
g)2(x+3)=7a
2x+3=7a
2x=7a-6 /:2
x=3,5a-3
h) 1/x=5+c /*x
1=(5+c)x /:(5+c)
x=1/(5+c)
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a) 2x+c=5x-8
2x-5x=-8-c
-3x=-8-c /:(-3)
x=(-8-c)/(-3)
x=(8+c)/3
b) x/2a=c /*2a
x=2ac
c) (x+5)/b=3 /*b
x+5=3b
x=3b-5
d) 7/(x+1)=2 /*(x+1)
7=2(x+1)
7=2x+2
2x=7-2
2x=5 /:2
x=2,5
e) (x+1)/4=2/3
3(x+1)=4*2
3x+3=8
3x=8-3
3x=5 /:3
x=5/3
f) (a+x)/y=1 /*y
a+x=y
x=y-a
g)2(x+3)=7a
2x+3=7a
2x=7a-6 /:2
x=3,5a-3
h) 1/x=5+c /*x
1=(5+c)x /:(5+c)
x=1/(5+c)