1. Remember to check your solution by substituting back into the original equation.
|
(a) |
x =11 |
(f) |
a = 8 |
|
(b) |
y = -16 |
(g) |
b = -7 |
|
(c) |
z = 15 |
(h) |
p = -1 |
| (d) | q = 2 | (i) | d = 28 |
| (e) | e = 20 | (j) | c = 2 |
2.
|
(a) |
y = 5 |
(f) |
x = 2 |
|
(b) |
x = 2 |
(g) |
q = -4 |
|
(c) |
x = 3 |
(h) |
x = -10 |
|
(d) |
x = 3 |
(i) |
s = 4 |
|
(e) |
p = 2 |
(j) |
x = -12 |
3.
|
(a) |
a = 4 |
(d) |
d = 10 |
|
(b) |
b = 3 |
(e) |
e = -5 |
|
(c) |
c = 2 |
(f) |
f = 4 |
4.
(a) The original number was 8
(b) The three consecutive odd numbers are 29, 31 and 33
(c) The number is 12
(d) Anna is 15 and Nicola is 13.
