X + 19 + 7x + 9 = 180
8x + 28 = 180
8x = 180 - 28
8x = 152
X = 152 : 8
X = 19
15 = 3*5
64= 2*2*2*2*2*2
There are no common factors so the GCF is 1
3x+25=90
-25=-25
3x=65
x=26.6666666666666666666666
I hope this helps!
For the transformation

the Jacobian is

with determinant

The vertices of the triangle in the
-plane are



Then the integral is

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