Odpowiedź :
Odpowiedź:
a)
x + 7 = 13
x = 13 - 7 = 6
b)
6 +x = 2
x = 2 - 6 = - 4
c)
- 3 + x = - 8
x = - 8 + 3 = - 5
d)
4x = 36
x = 36/4 = 9
e)
- 3x = 36
3x = - 36
x = - 36/3 = - 12
f)
x/9 = - 2
x = 9 * (- 2) = - 18
g)
x + 2 = 13
x = 13 - 2 = 11
h)
x - 5 = - 2
x = - 2 + 5 = 3
i)
3/4x = 1 1/8
x = 1 1/8 : 3/4 = 9/8 * 4/3 = 3/2 * 1 = 3/2 = 1,5
j)
5/6 + x = 1/3
x = 1/3 - 5/6 = 2/6 - 5/6 = - 3/6 = - 1/2
a) x+7=13 /-7
x = 6
b) 6+x=2 /-6
x = -4
c) -3+x=-8 /+3
x = 11
d) 4x=36 /:4
x = 9
e) -3x=36 /:(-3)
x = -12
f) x/9=-2 /*9
x = -18
g) x+2=13 /-2
x = 11
h) x-5=-2 /+5
x = 3
i) 3/4x=1 1/8
3/4x = 9/8 /*4/3
x = 3/2 = 1 1/2
j) 5/6+x=1/3
5/6 + x = 2/6 /-5/6
x = -3/6 = -1/2
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