I assumed i1 in the left-most mesh, i2 in the right-most mesh and i3 in the top mesh, all clockwise.
i2=-2 A from the circuit
The equations I got were: from left mesh: 11 - 14 i1 + 12 i2 + 2 i3 = 0 which becomes -14 i1 + 2 i3 - 13 = 0 after putting value of i2
Equation from top mesh: 8 i3 + 3 i2 + 4 i1 = 0 which becomes 4 i3 - 3 + 2 i1 = 0 after putting value of i2
On solving this I got i3 = 1.134 A and i1 = -1.536 A
So current through 15 ohm resistor should be i3 = 1.134 A and current through 3 ohm resistor is coming out to be i2-i3 = -2-1.134 = -3.134 A
But on putting the values in the circuit simulation, I'm getting current through 15 ohm = 453.3 mA
and current through 3 ohm = 1.5467 A
Can someone help me out and tell me what the error is? Have I taken wrong equation, made mistake in computing the values or is my simulation wrong?