Persamaan kalimat terbuka,BANTU PLEASE b. 3x+13=5x c.m-9=13 d.-11+x=3 e.2a+1=a-3

b. 3x + 13 = 5x
3x - 5x = -13
-2x = -13
x = 13/2

c. m-9=13
m=13+9
m=22

d. -12 + x =3
x= 3 +12
x= 14

e. 2a + 1 = a -3
2a -a = -3 -1
a = -4