SOLUTION: If a number is multiplied by 7 and this product is increased by 42, the result is 87 greater than twice th opposite of the number. Find the number

Algebra ->  Real-numbers -> SOLUTION: If a number is multiplied by 7 and this product is increased by 42, the result is 87 greater than twice th opposite of the number. Find the number       Log On


   

Question 394453: If a number is multiplied by 7 and this product is increased by 42, the result is 87 greater than twice th opposite of the number. Find the number
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
If a number is multiplied by 7 and this product is increased by 42,
the result is 87 greater than twice the opposite of the number.
:
Let x = "a number"
then
-x = "the opposite of the number"
:
Just write that it says
7x + 42 = 2(-x) + 87
7x + 42 = -2x + 87
7x + 2x = 87 - 42
9x = 45
x = 45%2F9
x = 5
:
:
Check solution in original statement
7(5) + 42 = 2(-5) + 87
35 + 42 = -10 + 87
77 = 77