Question

como resolvo 8a+13-a=4a+14 e 5x-8=12+x

Answer 1

8a + 13 - a = 4a + 14
+13 - 14 = 4a + a - 8a
-1 = -3a
1/3 = a

5x - 8 = 12 + x
5x - x = 12 + 8
4x = 20
x = 5