human
Solve basic introduction simultaneous equation problems, often involving shapes and symbols Chris orders \( 3 \) cups of tea and a cake, and his bill comes to £3.10

Amy orders \( 5 \) cups of tea and a cake, and her bill comes to \( £ 4.50 \).
How much does one cup of tea cost? \( 90 p \)
gpt
When solving simultaneous equations, thinks they can ignore one of the variables