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

↵

(

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C

↑

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↓

→

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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

↵

(

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C

↑

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→

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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

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c

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greek

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(

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C

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units
abc
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vector
logic
function
standard

7

8

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5

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units
abc
abc
abc
vector
logic
function
standard

p

∧

⊥

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∅

∪

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units
abc
abc
abc
vector
logic
function
standard

7

8

9

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4

5

6

−

1

2

3

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0

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sin

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logic
function
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8

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4

5

6

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2

3

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units
abc
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vector
logic
function
standard

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A

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dB

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mol

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units
abc
abc
abc
vector
logic
function
standard

7

8

9

+

4

5

6

−

1

2

3

÷

.

0

=

×∗×

√

a■

>

log

sin

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cos

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→

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1

2

3

4

5

6

7

Algebra: Variables

Substitution

What does substituting #b=8# in an expression mean?

This means that we add #8# to the expression.

This means that every occurrence of #b# in the expression is replaced by #8#.

This means we are allowed to multiply #b# by #8#.

This means that the expression is equal to #8#.

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