An augmented matrix for the system is [2,6,12;1,1,2] where we will call the first two columns A and the third b. A is linearly independent since it is row equivalent to the identity matrix, which tells us that for any b there will be a unique solution (x,y).
u/4=8/3 3u/12=32/12 Multiply each side by twelve to get rid of the denominator. 3u=32 u=1 2/3 1 and two-thirds equals 1.6666666 in decimal form, so the nearest tenth would be 1.7
