Odpowiedź :
[tex]a) \: 2x - 12 = 6 \\ 2x = 6 + 12 \\ 2x = 18 \: \: | \div 2 \\ x = 9[/tex]
[tex]b) \: 4 + 5x = 34 \\ 5x = 34 - 4 \\ 5x = 30 \: \: | \div 5 \\ x = 6[/tex]
[tex]c) \: - 8x + 10 = 4 \\ - 8x = 4 - 10 \\ - 8x = - 6 \: \: | \div ( - 8) \\ x = \frac{3}{4} [/tex]
[tex]d) \: 9 - x = 21 \\ - x = 21 - 9 \\ - x = 12 \: \: | \div ( - 1) \\ x = - 12[/tex]
[tex]e) \: \frac{1}{3} x - 4 = 5 \: \: \: | \times 3 \\ 3 \times \frac{1}{3} x - 4 \times 3 = 5 \times 3 \\ x - 12 = 15 \\ x = 15 + 12 \\ x = 27[/tex]
Odpowiedź:
a) 2x-12 = 6
2x = 18 //:2
x = 9
b) 4+5x = 34
5x = 30
x = 6
c) -8x+10 = 4
-8x = -6 //: (-8)
x = [tex]\frac{-6}{-8}[/tex]
x = [tex]\frac{3}{4}[/tex]
d) 9-x = 21
-x = 12 // * (-1)
x = -12
e) [tex]\frac{1}{3}[/tex]x-4 = 5
[tex]\frac{1}{3}[/tex]x = 9 // : [tex](\frac{1}{3})[/tex]
x = 9 / [tex]\frac{1}{3}[/tex]
x = 9 * [tex]\frac{3}{1}[/tex]
x = 27
Szczegółowe wyjaśnienie: