Question #85f82
3 Answers
Let.... the first number be
And the second number be
A.T.Q.
Solve the first one first
Subtract y from both sides
You get
Substitute this value in
Subtract 40 from both sidess
Which gives us
Minuses cut each other out
Which gives us
Which is
15 and 25
Explanation:
(1)
(2)
Equation (2):
Put equation (2) in equation (1):
Plug back in one of the initial equation to find x:
25 and 15
Explanation:
We can generalize the above statement into two equations:
and
Now we can solve this problem using simultaneous equations,
Substitution Time:
To find x, simply substitute y back into any of the equations