Highlight
Highlight
Substitution
Easy
Medium
Hard
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
Question 81
Medium
a=7b+12a = 7b + 12
a
=
7
b
+
12
Find the value of
a a\,
a
when
b=4b = 4
b
=
4
[2]
Write your answer here...
Markscheme
Ask Genie
Walkthrough
3
Grade answer
Substitution Questions
GCSE
/
Maths
/
Substitution