Physics and Maths (STEM) Tutor - coaching for all - from GCSE through A-Level to Degree
Other tutor / coaching services: GCSE/A-level Computer Science
Proper, Improper and Mixed Fractions
Fractional Arithmetic
Changing the Subject of an Expression
Multiplying Expressions
Factorising Quadratic Expressions
Solving Linear Equations
Rationalising the Denominator
Solving Simultaneous (Linear) Equations
Ex. 0:
[1] 1 x
+
6 y
=
-2
[2] 6 x
+
-10 y
=
5
==> x
=
-5
-23
, y
=
17
-46
Ex. 1:
[1] 7 x
+
13 y
=
8
[2] 7 x
+
10 y
=
6
==> x
=
2
-21
, y
=
-2
-3
Ex. 2:
[1] 11 x
+
-16 y
=
7
[2] 4 x
+
19 y
=
0
==> x
=
19
39
, y
=
-4
39
Ex. 3:
[1] 16 x
+
-6 y
=
-3
[2] 17 x
+
-11 y
=
-13
==> x
=
-45
-74
, y
=
-157
-74
Ex. 4:
[1] 7 x
+
-19 y
=
-14
[2] 17 x
+
-19 y
=
-3
==> x
=
11
10
, y
=
217
190
Ex. 5:
[1] 15 x
+
5 y
=
4
[2] 2 x
+
18 y
=
18
==> x
=
-9
130
, y
=
131
130
Ex. 6:
[1] 7 x
+
-9 y
=
-18
[2] 14 x
+
10 y
=
3
==> x
=
-153
196
, y
=
39
28
Ex. 7:
[1] 1 x
+
9 y
=
-5
[2] 11 x
+
16 y
=
-12
==> x
=
28
-83
, y
=
43
-83
Ex. 8:
[1] 2 x
+
-14 y
=
11
[2] 14 x
+
3 y
=
-14
==> x
=
-163
202
, y
=
-91
101
Ex. 9:
[1] 16 x
+
7 y
=
0
[2] 5 x
+
5 y
=
-10
==> x
=
14
9
, y
=
-32
9