Substitution

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units
abc
abc
abc
vector
logic
function
standard

α

β

δ

γ

ϵ

ζ

η

θ

ι

κ

λ

μ

ν

ξ

ο

π

ρ

σ

τ

υ

φ

χ

ψ

ω

Δ

Γ

Θ

Λ

Ξ

Σ

Φ

Ψ

Ω

abc

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

Q

W

E

R

T

Y

U

I

O

P

A

S

D

F

G

H

J

K

L

shift

Z

X

C

V

B

N

M

greek

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

q

w

e

r

t

y

u

i

o

p

a

s

d

f

g

h

j

k

l

shift

z

x

c

v

b

n

m

greek

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

7

8

9

+

4

5

6

−

1

2

3

÷

.

0

=

×∗×

√

a■

{......

[

,

]

i

,

∞

{}

det

(m×n)

∙

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

p

∧

⊥

φ

∀

>

=

⊢

N

∅

∪

⊂

q

∨

⊤

ψ

∃

<

≠

⊨

Z

∈

∩

⊆

∄

→

□

⊕

P

≥

∖

Q

∉

⇒

⊬

⊃

¬

↔

◇

⧆

R

≤

⊭

≡

{}

R

⇔

⊇

↵

(

)

C

↑

←

↓

→

x

y

a

#x#

units
abc
abc
abc
vector
logic
function
standard

7

8

9

+

4

5

6

−

1

2

3

÷

.

0

=

×∗×

√

a■

>

log

sin

[

,

]

<

ln

cos

lim

∞

[

,

)

≥

|

|

tan

e

,

(

,

]

≤

!

arc

π

a

{......

(

,

)

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

7

8

9

+

4

5

6

−

1

2

3

÷

.

0

=

×∗×

√

a■

>

log

sin

∧

∨

<

ln

cos

all

none

≥

|

|

tan

e

≤

!

π

°

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

m

g

s

N

K

°C

cd

J

W

C

A

V

Ω

H

F

dB

Hz

mol

M

eV

Pa

bar

n

μ

m

c

d

da

h

k

M

G

units

↵

(

)

C

↑

←

↓

→

x

y

#x#

units
abc
abc
abc
vector
logic
function
standard

7

8

9

+

4

5

6

−

1

2

3

÷

.

0

=

×∗×

√

a■

>

log

sin

∧

∨

<

ln

cos

all

none

≥

|

|

tan

e

≤

!

π

°

↵

(

)

C

↑

←

↓

→

x

y

#x#

1

2

3

4

5

6

7

Algebra: Variables

Substitution

What does substituting #z=-9# in an expression mean?

This means that the expression is equal to #-9#.

This means that we add #-9# to the expression.

This means that every occurrence of #z# in the expression is replaced by #-9#.

This means we are allowed to multiply #z# by #-9#.

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