Odpowiedź :
a) x + (x - 3) = 25
2x - 3 = 25
2x = 25 + 3
2x = 28 /:2
x = 14
b) x - 7 = [tex]\frac{1}{2}x[/tex] + 1
x - [tex]\frac{1}{2}x[/tex] = 1 + 7
[tex]\frac{1}{2}x = 8[/tex] /*2
x = 16
a) x + (x - 3) = 25
2x - 3 = 25
2x = 25 + 3
2x = 28 /:2
x = 14
b) x - 7 = [tex]\frac{1}{2}x[/tex] + 1
x - [tex]\frac{1}{2}x[/tex] = 1 + 7
[tex]\frac{1}{2}x = 8[/tex] /*2
x = 16