CAIE IGCSE Mathematics Core C2.5.3 Solve Simultaneous Linear Equations Topic Practice

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Question 23

[Maximum number: 6]

There are two charges for crossing a bridge.
Cars $a
Other vehicles $b

On Monday 4 cars and 20 other vehicles pay a total of $130.
On Tuesday 6 cars and 15 other vehicles pay a total of $105.
Write down two equations and solve them to find the value of a and the value of b.