a)
8x=6x+28
8x-6x=28
2x=28
x=28:2
x=14
Spr.
L=8*14=112
P=6*14+28=84+28=112
L+P
b)
14(x-0,5)=6x-35
14x-7=6x-35
14x-6x=7-35
8x=-28
x=-28:8
x=3,5
Spr.
L=14*(-3,5-0,5)=14*(-4)=-56
P=6*(-3,5)-35=-21-35=-56
L=P
c)
8x-16=14+0,6x
8x-0,6x=14+16
7,4x=30
x=30:7,4
x=30*\frac{10}{74}
x=30*\frac{5}{37}
x=\frac{150}{37}=4\frac{2}{37}
Spr.
L=8*\frac{150}{37}-16=\frac{1200}{37}-16=32\frac{16}{37}-16=16\frac{16}{37}
P=14+\frac{6}{10}*\frac{150}{37}=14+\frac{90}{37}=
=14+2\frac{16}{37}=16\frac{16}{37}
L=P