Odpowiedź :
Odpowiedź:
a) 5x + 4 = 19
5x = 19 - 4
5x = 15
x = 3
b) 3x - 2 + 5x + 9 = 11
3x + 5x = 11 +2 - 9
8x = 4
[tex]x = \frac{1}{2}[/tex]
c) -3(a + 6) + a = 2(4a - 12)
-3a - 18 + a = 8a - 24
-3a + a - 8a = -24 + 18
-10a = -6
10a = 6
a = [tex]\frac{6}{10}[/tex]
d) 2x + 2(2x - 3) = 28
2x + 4x - 6 = 28
2x + 4x = 28 + 6
6x = 34
x = [tex]\frac{34}{6} = 5\frac{1}{3}[/tex]
Odpowiedź:
a) 5x + 4 = 19
5x = 15 /:5
x = 3
b) 3x − 2 + 5x + 9 = 11
8x = 11 - 9 + 2
8x = 4 /:8
x = 1/2
c) −3( a + 6 ) + a = 2( 4a − 12 )
-3a - 18 + a = 8a - 24
-18 +24 = 8a +3a - a
6 = 10a /:10
a = 6/10 = 0,6
d) 2x + 2( 2x − 3) = 28
2x + 4x - 6 = 28
6x = 34/:6
x = 17/3
Szczegółowe wyjaśnienie: