Respuesta :
Answer:
answer is 1
Step-by-step explanation:
7*9=63
7*10=70
63=70-7x
subtract 70 from both sides
it will be -7=-7x
x=1
Answer:
answer is 1
Step-by-step explanation:
7*9=63
7*10=70
63=70-7x
subtract 70 from both sides
it will be -7=-7x
x=1