Question

The cost for 4 lunches and six dinners is $122 the cost of five lunches and eight dinners is $160 find the cost of one lunch

Answer 1

Lunch costs $8

Explanation:

4l + 6d = 122

5l + 8d = 160

Multiply the first equation by 4 and the second by -3:

16l + 24d = 488

-15l - 24d = -480

-------------------------

l = 8

Lunch costs $8

Answer 2

80

Explanation: