Answer:
21; steps are included:
Step-by-step explanation:
lets put this unknown number as a variable (n)
now lets write the equation out: (n=the unknown number)
16 = n-5
To keep the equation balanced we add 5 to both sides:
16+5=n-5+5
21=n
Now that means the unknown value is 21
Hope this helped
Answer: sorry don't know no pressure right
Step-by-step explanation:
Answer:
same but like 123
Step-by-step explanation:
Answer:
Step-by-step explanation:
2,9,6, 2, 3
Answer:
x = 4, y = -3
Step-by-step explanation:
{2x - y = 11
{x + 3y = -5
You can use the substitution method by solving for x in the second equation:
x + 3y = -5
Subtract 3y from both sides:
x = -3y - 5
Now, substitute this value for x into the first equation:
2x - y = 11
2(-3y - 5) - y = 11
Distribute:
-6y - 10 - y = 11
Add 10 to both sides:
-6y - y = 21
Combine like terms:
-7y = 21
Divide both sides by -7:
y = -3
Next, substitute this value for x into the second equation:
x + 3y = -5
x + 3(-3) = -5
Multiply:
x - 9 = -5
Add 9 to both sides:
x = 4
