Question

resolva as equações 20×-13=20+9x

Answer 1

20x-13= 20+9x
20x-9x= 20+13
11x= 33
x= $\frac{33}{11}$
x= 3

Answer 2

20x-13=20+9×
20×-9×=20+13
11×=33
×=33/11
×=3