1. Wyznacz ,,x''
a) a/b + x/c = 4
b) ax - bx = c
c) 2a/c = x/a
d) b/x = 2a/3
e) x/5c = 5/a
f) a-b/c = x/4
2. Wyznacz podane wielkości
a) P = 2 (ab+ac+bc) - wyznacz b
b) 3-c/a+b = 2 - wyznacz b
c) a + b = 1/c - wyznacz c
PROSZE O POMOC!!
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
1. Wyznacz ,,x''
a)
a/b + x/c = 4 /*c
ac/b + x = 4c
x= 4c - ac/b
b)
ax - bx = c
x(a-b) = c / : (a-b)
x= c/(a-b)
c)
2a/c = x/a / *a
x=2a²/c
d)
e)
x/5c = 5/a / *5c
x= 25c/a
f)
a-b/c = x/4 /*4
x=
2.
a)
P = 2 (ab+ac+bc) /:2
P/2 = ab+ac+bc
P/2 = ac + b(a+c) /-ac
b(a+c) = P/2-ac /:(a+c)
b=
b)
3-c/a+b = 2 /-b
3-c/a = 2-b / -2
b= 3-c/a-2
c)
a + b = 1/c * c
c(a+b)=1 / : (a+b)
c= 1/(a+b)