Respuesta :
Answer:
36
Step-by-step explanation:
a+b=90
if a=54 then insert a back into a+b=90
54+b=90
subtract the equation by 54
54-54+b=90-54
b=36
Hope that helps :)
Answer:
36
Step-by-step explanation:
a+b=90
if a=54 then insert a back into a+b=90
54+b=90
subtract the equation by 54
54-54+b=90-54
b=36
Hope that helps :)