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Guest
Guest
WHAT HAVE I DONE WRONG IN THIS PROBLEM? I GOT THE ANSWER OF -3 WHEN IT SHOULD BE 3.
Problem:
Gary, Barry and Terry belong to a car club. Gary’s car is, five times as old as Barry’s car, and Terry’s car is, six years younger than Gary’s. In three years, the age of Terry’s car will be twice the age of Barry’s. How old is Gary’s car now?
x + 3 = 2(x + 3)
x + 3 = 2x + 6
subtract -3 from both sides
1x = 2x + 3
subtract -2x from both sides
-1x = 3
Divide both sides by -1
x = -3 THAT'S NOT RIGHT
Problem:
Gary, Barry and Terry belong to a car club. Gary’s car is, five times as old as Barry’s car, and Terry’s car is, six years younger than Gary’s. In three years, the age of Terry’s car will be twice the age of Barry’s. How old is Gary’s car now?
Code:
GARY BARRY TERRY
Now: 5x x 5x – 6
Later: 5x + 3 x + 3 2(x + 3)
x + 3 = 2x + 6
subtract -3 from both sides
1x = 2x + 3
subtract -2x from both sides
-1x = 3
Divide both sides by -1
x = -3 THAT'S NOT RIGHT