Ramon sells two enchiladas and three tacos for $/$$2.50 and he sells three enchiladas and two tacos for $/$$2.70. Assuming a fixed price per item, what is the cost, in dollars, of three enchiladas and four tacos

3.54 dollars

Explanation:

2.50 = 250 cents

2.70 = 270 cents

2e + 3t = 250

e = (250 - 3t) / 2

3 ((250 - 3t) / 2) + 2t = 270

(750 - 9t) / 2 + 2t = 270

750 - 9t + 4t = 540

750 - 5t = 540

210 = 5t

t = 42

e = (250 - 3t) / 2

e = (250 - 126) / 2

e = 124 / 2

e = 62

3e + 4t = 3 (62) + 4 (42) = 354 cents or 3.54 dollars