poziom A
a) 4 * x - 3+5 * x = 15
b) 5x + 7 - 3 * x = 13
c) 7 * x-2-6 * x = 5
d) 6 * x - 4 + 4 * x = 56
poziom B
a) 6 * X = 2 - x - 8
b) 8 * x = 9+ 5 * x
c) 7* x = 2 * x - 20
d) 2 * x = 12 - 2 * x
poziom C
a) 8 - 3 * x = 6 * X-10
b) 7 * x - 4 = 9 + 8 * x
c) -5 + 7.x = 2.x - 20
d) 8 - 2 * x = - 4+2 * X

Pls​



Odpowiedź :

Lea3

Poziom A

a)

[tex]4 \times x - 3 + 5 \times x = 15[/tex]

[tex]4x - 3 + 5x = 15[/tex]

[tex]9x = 18[/tex]

[tex]x = 2[/tex]

b)

[tex]5x + 7 - 3 \times x = 13[/tex]

[tex]5x + 7 - 3x = 13[/tex]

[tex]2x = 6[/tex]

[tex]x = 3[/tex]

c)

[tex]7 \times x - 2 - 6 \times x = 5[/tex]

[tex]7x - 2 - 6x = 5[/tex]

[tex]x = 7[/tex]

d)

[tex]6 \times x - 4 + 4 \times x = 56[/tex]

[tex]6x - 4 + 4x = 56[/tex]

[tex]10x = 60[/tex]

[tex]x = 6[/tex]

Poziom B

a)

[tex]6 \times x = 2 - x - 8[/tex]

[tex]6x = 2 - x - 8[/tex]

[tex]7x = - 6[/tex]

[tex]x = - \frac{6}{7} [/tex]

b)

[tex]8 \times x = 9 + 5 \times x[/tex]

[tex]8x = 9 + 5x[/tex]

[tex]3x = 9[/tex]

[tex]x = 3[/tex]

c)

[tex]7 \times x = 2 \times x - 20[/tex]

[tex]7x = 2x - 20[/tex]

[tex]5x = - 20[/tex]

[tex]x = - 4[/tex]

d)

[tex]2 \times x = 12 - 2 \times x[/tex]

[tex]2x = 12 - 2x[/tex]

[tex]4x = 12[/tex]

[tex]x = 3[/tex]

Poziom C

a)

[tex]8 - 3 \times x = 6 \times x - 10[/tex]

[tex]8 - 3x = 6x - 10[/tex]

[tex] - 9x = - 18[/tex]

[tex]x = 2[/tex]

b)

[tex]7 \times x - 4 = 9 + 8 \times x[/tex]

[tex]7x - 4 = 9 + 8x[/tex]

[tex] - x = 13[/tex]

[tex]x = - 13[/tex]

c)

[tex] - 5 + 7x = 2x - 20[/tex]

[tex]5x = - 15[/tex]

[tex]x = - 3[/tex]

d)

[tex]8 - 2 \times x = - 4 + 2 \times x[/tex]

[tex]8 - 2x = - 4 + 2x[/tex]

[tex] - 4x = - 12[/tex]

[tex]x = 3[/tex]