how do you solve x+y=8 and 6x+3.8y=30

Question

x is ounces of almonds and y is ounces of carrob chips. In each ounce of almonds, there is 6 grams of protein. In each ounce of carrob chips there are 3.8 grams of protein. Need number of ounces of each to equal 8, and total grams of protein to be 30.

Answer 1

line 1: x+y=8   or y=-x+8

line 2: 6x+3.8y=30

line2...6x +3.8(8-x) =30

6x -3.8x +30.4=30

2.2x =-0.4

x=-0.181818

dont look good