Odpowiedź :
[tex]j) 5s - 9 = -6\\5s = -6 + 9\\5s = 3\\s = \frac{3}{5}= 0,6 \\k) 7-2x= 15\\-2x = 15 - 7\\-2x = 8\\x = -4\\i)8x+3 = 43\\8x = 43 - 3\\8x = 40\\x = 5[/tex]
i)
[tex]8x + 3 = 43 \\ 8x = 40 | \div 8 \\ x = 5[/tex]
j)
[tex]5s - 9 = - 6 \\ 5s = 3 | \div 5 \\ s = \frac{3}{5} [/tex]
k)
[tex]7 - 2x = 15 \\ - 2x = 8 | \div ( - 2) \\ x = - 4[/tex]