I need to find the measure of each triangle

Question

In a triangle, the first angle is 20 more than the second angle. The sum of the angle measures in a triangle is 180 degrees. Find the measure of each angle.

Answer 1

a + b + c = 180

a = 20 +b

20+b+b + c = 180

c = 160 -2b

b = a -20

0 < b < 160

Need more info to narrow it down more

20<a <160

0< c < 160