NÅGRA KOMMENTARARER TILL LÖSNINGARNA

1106a
x
15 =
2
( mult 2)
215 ⋅ = 2⋅
30 = x
x = 30
x
2
1107a
500
20 = ( mult x)
x
500
x⋅ 20 = x ⋅
x
20x = 500 ( div 20)
20 x 500
=
20 20
x = 25
1108a
x
17 =
a
( mult a)
a⋅ 17 = a ⋅
17a=
x
x= 17a
x
a
LÖSNINGAR DEL B
1106b
x
a = ( mult b)
b
x
b⋅ a= b ⋅
b
ab = x
x= ab
1107b
d
c =
x
( mult x)
x⋅ c= x ⋅
cx = d
c x d
=
c c
d
x =
c
d
x
( div c)
1108b
x
tan v =
32
( mult 32)
32⋅ tan v = 32 ⋅
32tan v= x
x= 32tan v
x
32
1106c
x
tan v =
7
( mult 7)
7⋅ tanv= 7 ⋅
7tanv=
x
x= 7tanv
x
7
1107c
30
tan v = ( mult x)
x
30
x⋅ tan v= x ⋅
x
xtan v=
30
xtan v 30
=
tan v tan v
30
x =
tan v
1108c
c
20 =
x
( mult x)
x⋅ 20 = x ⋅
20x=
c
20 x c
=
20 20
c
x =
20
( div tan v)
c
x
( div 20)
1106d
x
tan v =
a
( mult a)
a⋅ tan v= a ⋅
atan v= x
x= atan v
1107d
a
tan v = ( mult x)
x
a
x⋅ tan v= x ⋅
x
xtan v= a
xtan v a
=
tan v tan v
a
x =
tan v
x
a
( div tan v)
1108d
d
tan v = ( mult x)
x
d
x⋅ tan v= x ⋅
x
xtan v= d
xtan v d
=
tan v tan v
d
x =
tan v
( div tan v)
1