Odpowiedź:
A
e) 2 * x - 3 + x = 9 spr. 2 * 4 - 3 + 4 =
2x - 3 + x = 9 | +3 8 - 3 + 4 =
3x = 12 | :3 5 + 4 = 9
x = 4
f) 3 * x - 5 - x = 11 spr. 3 * 8 - 5 - 8 =
3x - 5 - x = 11 | +5 24 - 5 - 8 =
3x - x = 16 19 - 8 = 11
2x = 16 | :2
x = 8
g) x - 5 + 6 * x = 16 spr. 3 - 5 + 6 * 3 =
x - 5 + 6x = 16 | +5 -2 + 18 = 16
x + 6x = 21
7x = 21 | :7
x = 3
B
e) 9 * x = 3 * x + 12
9x = 3x + 12
9x - 3x = 12
6x = 12 | :6
x = 2
f) 10 * x = 4 * x - 6
10x = 4x - 6
10x - 4x = - 6
6x = - 6 | :6
x = 0
g) 3 * x = 9 - 6 * x
3x = 9 - 6x
3x + 6x = 9
9x = 9 | :9
Nie jestem pewna czy poziom B jest dobrze, ale mam nadzieję, że pomogłam.
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Odpowiedź:
A
e) 2 * x - 3 + x = 9 spr. 2 * 4 - 3 + 4 =
2x - 3 + x = 9 | +3 8 - 3 + 4 =
3x = 12 | :3 5 + 4 = 9
x = 4
f) 3 * x - 5 - x = 11 spr. 3 * 8 - 5 - 8 =
3x - 5 - x = 11 | +5 24 - 5 - 8 =
3x - x = 16 19 - 8 = 11
2x = 16 | :2
x = 8
g) x - 5 + 6 * x = 16 spr. 3 - 5 + 6 * 3 =
x - 5 + 6x = 16 | +5 -2 + 18 = 16
x + 6x = 21
7x = 21 | :7
x = 3
B
e) 9 * x = 3 * x + 12
9x = 3x + 12
9x - 3x = 12
6x = 12 | :6
x = 2
f) 10 * x = 4 * x - 6
10x = 4x - 6
10x - 4x = - 6
6x = - 6 | :6
x = 0
g) 3 * x = 9 - 6 * x
3x = 9 - 6x
3x + 6x = 9
9x = 9 | :9
x = 0
Nie jestem pewna czy poziom B jest dobrze, ale mam nadzieję, że pomogłam.