Question

3x + 4x +2a +2b = 5x + 3a + b ( son ecuaciones de 1 er grado )

Answer 1

3x +4x -5x= 3a +b -2a -2b
2x = a -b
2• x = a -b
x = a -b : 2

2a -3a = 5x +b -3x -2b -4x
-a = -2x -b
a = 2x +b (se cambian signos)

2b -b = 5x + 3a -3x -4x -2a
b = a -2x