SOLUTION: The sum of twho numbers is 89. Adding four times the first number to the second number gives 155. WHich one of the follwoing equaitons expresses this problem algebraically?

Question 145494: The sum of twho numbers is 89. Adding four times the first number to the second number gives 155. WHich one of the follwoing equaitons expresses this problem algebraically?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The sum of two numbers is 89.
x + y = 89
x = (89-y)
:
Adding four times the first number to the second number gives 155.
4x + y = 155
:
y = 155 - 4x; is one of the possible equations
:
:
To solve it, substitute (89-y) for x:
y = 155 - 4(89-y)
:
y = 155 - 356 + 4y
:
y - 4y = -201
:
-3y = -201
y =
y = +67; and x = (89-67) = 22

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