# Algebra - Substituion

a - answer    s - solution    v - video    d - discussion

## Question 1

Evaluate the following expressions when $a=2$

a) $a+1$a s v d
b) $a+3$a s v d
c) $a+17$a s v d
d) $4+a$a s v d
e) $113+a$a s v d

## Question 2

Evaluate the following expressions when $x=10$

a) $x-2$a s v d
b) $x-7$a s v d
c) $15-x$a s v d
d) $83-x$a s v d
e) $x+12-x$a s v d

## Question 3

Evaluate the following expressions when $b=5$

a) $b\times2$a s v d
b) $b\times5$a s v d
c) $6\times b$a s v d
d) $b\times8$a s v d
e) $8\times b$a s v d
f) $8b$a s v d
g) $7\times b$a s v d
h) $7b$a s v d
i) $10b$a s v d
j) $10b+1$a s v d
k) $10b-2$a s v d
l) $3+4b$a s v d
m) $40-4b$a s v d
n) $2b+3b$a s v d
o) $6b-2-5b+4$a s v d

## Question 4

Evaluate the following expressions when $y=36$

a) $y\div2$a s v d
b) $y\div4$a s v d
c) $\frac y4$a s v d
d) $y\div12$a s v d
e) $\frac {y}{12}$a s v d
f) $\frac {y}{12}+4$a s v d
g) $\frac {y}{12}-2$a s v d
h) $9+\frac {y}{12}$a s v d
i) $10-\frac {y}{12}$a s v d
j) $\frac {y+14}{10}$a s v d
k) $\frac {y-4}{2}$a s v d
l) $\frac {50-y}{7}$a s v d
m) $\frac {80}{y+4}$a s v d
n) $\frac {100}{y-16}$a s v d
o) $\frac {y}{y-30}$a s v d
p) $\frac {y+9}{y-31}$a s v d
q) $\frac {2y+3}{y-11}$a s v d
r) $\frac {y-16}{3y-8}$a s v d

## Question 5

Evaluate the following expressions when $d=24$

a) $3(d+1)$a s v d
b) $4(d-4)$a s v d
c) $d(2+3)$a s v d
d) $2(30-d)$a s v d
e) $d(d-21)$a s v d
f) $3(2d+2)$a s v d
g) $2(50-2d)$a s v d
h) $\frac {3(2d-8)}{12}$a s v d

## Question 6

Evaluate the following expressions when $h=2$

a) $h^2$a s v d
b) $h^3$a s v d
c) $h^5$a s v d
d) $3\times h^2$a s v d
e) $3h^2$a s v d
f) $4\times h^3$a s v d
g) $4h^3$a s v d
h) $4h^2-3$a s v d
i) $2+5h^3$a s v d
j) $\frac {h^6}{2}$a s v d
k) $\frac {h^6+6}{h^4-6}$a s v d

## Question 7

Evaluate the following expressions when $x=3$, $y=4$ and $z=5$

a) $x+y$a s v d
b) $x+y+z$a s v d
c) $x+y-z$a s v d
d) $2x+z$a s v d
e) $6y-x$a s v d
f) $x\times y$a s v d
g) $xy$a s v d
h) $xz$a s v d
i) $xyz$a s v d
j) $\frac {10xy}{z}$a s v d
k) $x(y+7)$a s v d
l) $x(y+z)$a s v d
m) $x^2-z$a s v d
n) $z^x$a s v d
o) $\frac {x^y}{16z+1}$a s v d

## Question 8

Evaluate the following expressions when $f=6$, $g=10$ and $h=13$

a) $\frac fg$a s v d
b) $\frac {f}{gh}$a s v d
c) $f^3-h$a s v d
d) $\sqrt{fg+4}$a s v d
e) $\frac {z^2+1}{g-f}$a s v d
f) $gh-\frac {3+fg}{f+1}$a s v d