The question is:

the only quantities of good 1 that Barbie can buy are 1 unit or zero units. For x₁ equal to zero or 1 and for all positive values of x₂, suppose that Barbie's preferences were represented by the utility function (x₁ + 6)(x₂ + 4). Then if her income were $16, her reservation price for good 1 would be:

I have done u1(0,16)=u2(1,m-Rp)

with then (0+6)(16+4)= 2(m-Rp-1)

Yet, I cant solve for reservation price