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-7b = ⅞ |:(-7)
x = -⅛
b)
2-x = 5-2x
-x+2x - 5-2
x = 3
c)
½x+5 = x+8
½x-x = 8-5
-½x = 3 |:(-½)
x = -6
d)
17 = 11-12x
12x = 11-17
12x = -6 |:12
x = -0,5
e)
3⅔ = ½x-⅓
3⅔+⅓ = ½x
½x = 4 |:½
x = 8
-7b=⅞
-7b=⅞/:(-7)
b=⅛
b)
2-x=5-2x
-x+2x=5-2
x=3/:1
x=3
c)½x+5=x+8
½x-x=8-5
-½x=3/:(-½)
x=-6
d)17=11-12x
12x=11-17
12x=-6/:12
x=-½
e)
3⅔=½x-⅓
-½x=-⅓-3⅔
-½x=-4/:(-½)
x=8
-7b= ⅞ / (-7)
b= -⅛
b) 2 - x = 5 - 2x
-x +2x= -2 +5
1x= 3/ 1
x= 3
c) ½x + 5 = x + 8
½x- x= - 5 +8
-½x= 3/(- ½)
x= -6
d) 17 = 11 - 12x
12x= -17 +11
12x= -6 /12
x= - ½
e) 3⅔ <dwie trzecie> = ½x - ⅓ <jedna trzecia>
- ½x= -3⅔ -⅓
-½x= -4 / (-½)
x= 8