One adult ticket costs £11 and one child ticket costs £8.5
Step-by-step explanation:
Let,
Adult ticket = a
Child ticket = c
According to given statement;
3a+4c=67 Eqn 1
5a+6c=106 Eqn 2
Multiplying Eqn 1 by 5;

Multiplying Eqn 2 by 3;

Subtracting Eqn 4 from Eqn 3

Dividing both sides by 2

Putting c=8.5 in Eqn 1

Dividing both sides by 3;

One adult ticket costs £11 and one child ticket costs £8.5
Keywords: Linear equation, subtraction
Learn more about linear equations at:
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(25.45-12.5)+12.45
25.45-12.5
=12.95
12.95+12.45
=25.4 Is your answer
^o^
Its not. There are 100 cm in a meter, 1000 in 10 meters.