Question 775668
Congrats! You have set the equations correctly.


Now it comes down to how we can solve them.

From the second equation you can express B in terms of A as: B=A-3.
Plug this value of B in first equation.
Then it becomes: 10A + 12(A-3) = 140


Now you have an equation with one variable and I am sure that you can solve it yourself. The answer is A = 8, B = 5.


If you need guidance regarding solving of simultaneous equations in two or more unknowns then you can contact me and I can teach you the different techniques of solving these equations and tips and tricks useful for quick solutions.


Cheers!!!