Odpowiedź:
a)
3x - 1 = 2x + 5
3x - 2x = 5 + 1
x = 6
Sprawdzenie
L = 3 * 6 - 1 = 18 - 1 = 17
P = 2 * 6 + 5 = 12 + 5 = 17
L = P
b)
5x + 1 = 3x - 5
5x - 3x = - 5 - 1
2x = - 6 // :2
x = - 3
L = 5 * (-3) + 1 = - 15 + 1 = - 14
P = 3 * (-3) - 5 = - 9 - 5 = - 14
c)
2(x-1) = 10
2x - 2 = 10
2x = 10 + 2
2x = 12 // :2
L = 2(6 - 1) = 2 * 5 = 10
P = 10
d)
3(x+1) - 2(x - 3) = 7
3x + 3 - 2x + 6 = 7
3x - 2x = 7 - 3 - 6
x = - 2
L = 3(- 2 + 1) - 2(- 2 - 3) = 3 * (- 1) - 2 * (- 5) = - 3 + 10 = 7
P = 7
Mam nadzieję że pomogłem liczę na naj :)
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Odpowiedź:
a)
3x - 1 = 2x + 5
3x - 2x = 5 + 1
x = 6
Sprawdzenie
L = 3 * 6 - 1 = 18 - 1 = 17
P = 2 * 6 + 5 = 12 + 5 = 17
L = P
b)
5x + 1 = 3x - 5
5x - 3x = - 5 - 1
2x = - 6 // :2
x = - 3
Sprawdzenie
L = 5 * (-3) + 1 = - 15 + 1 = - 14
P = 3 * (-3) - 5 = - 9 - 5 = - 14
L = P
c)
2(x-1) = 10
2x - 2 = 10
2x = 10 + 2
2x = 12 // :2
x = 6
Sprawdzenie
L = 2(6 - 1) = 2 * 5 = 10
P = 10
L = P
d)
3(x+1) - 2(x - 3) = 7
3x + 3 - 2x + 6 = 7
3x - 2x = 7 - 3 - 6
x = - 2
Sprawdzenie
L = 3(- 2 + 1) - 2(- 2 - 3) = 3 * (- 1) - 2 * (- 5) = - 3 + 10 = 7
P = 7
L = P
Mam nadzieję że pomogłem liczę na naj :)