a)
x * 7 - 11 = 10 /+11
x*7 = 21
7x = 21 /:7
x = 3
Spr. L = 3*7 - 11 = 21 - 11 = 10 P = 10 L = P
b)
[tex]\frac{1}{2} *x + 6 = 13[/tex] /- 6
[tex]\frac{1}{2}*x = 7[/tex]
[tex]\frac{1}{2}x = 7[/tex] /*2
x = 14
Spr. L = [tex]\frac{1}{2}*14 + 6 = 7 + 6 = 13[/tex] P = 13 L = P
c)
5*x + 21 = 46 /-21
5*x = 25
5x = 25 /:5
x = 5
Spr. L = 5*5 + 21 = 25 + 21 = 46 P=46 L=P