Respuesta :
402-15x= 237
subtract 402 from both sides
15x = Â -165
-165
--------
15x
11 Â swimming lesson
19x =237
divide 19 from each side
237
-----
19
12.4....
12 lessonsÂ
subtract 402 from both sides
15x = Â -165
-165
--------
15x
11 Â swimming lesson
19x =237
divide 19 from each side
237
-----
19
12.4....
12 lessonsÂ