Dianne bought 4 tacos and a chalupa for $11.50. Anthony bought 3 tacos and 2 chalupas for $13. Find out how much each item costs.
4 t + c = 11.5
3 t + 2 c = 13
multiply the 1st equation by 2 , then subtract the 2nd equation
... this will eliminate c
... solve for t , then substitute back to one of the original equations to find c