Odpowiedź :
a)
[tex] - 2 = x + 5 \\ x + 5 = - 2 \\ x = - 2 - 5 \\ x = - 7[/tex]
b)
[tex]2 \frac{3}{8} = x + 1 \frac{1}{8} \\ x + 1 \frac{1}{8} = 2 \frac{3}{8} \\ x = 2 \frac{3}{8} - 1 \frac{1}{8} \\ x = 1 \frac{2}{8} [/tex]
c)
[tex]5.3 = x - 1.4 \\ x - 1.4 = 5.3 \\ x = 5.3 + 1.4 \\ x = 6.7[/tex]
d)
[tex]15 = - 3x \\ - 3x = 15 \: | \div - 3 \\ x = - 5[/tex]
Odpowiedź:
x+5=-2
x= -7
x+1 1/8=2 3/8
x=2 3/8- 1 /18
x=1 2/8=1 1/4
x-1,4=5,3
x=6,7
-3x=15/:(-3)
x=-5