Yes they can for example:
3 adults and 4 children cost £48.50 and
2 adults and 3 children cost £34
find the cost of one of each :
1 adult = £9.50
1 child = £5.00
very simple forms but yes there can be.
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A simultaneous equation
For a complete guide on when to use simultaneous method in indices maths visit mathsrevision.net/gcse-maths-revision/algebra/simultaneous-equations
Linear Equations are equations with variable with power 1 for eg: 5x + 7 = 0 Simultaneous Equations are two equations with more than one variable so that solving them simultaneously
They are equations that involve many steps to find the solution.
Two dependent linear equations are effectively the same equation - with their coefficients scaled up or down.