2 x 39 = 78
An answer 9 years later . . .
Chat with our AI personalities
You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer.
2*39 = 78.
2x + 6 + 9x = 39 11x + 6 = 39 11x = 39 - 6 11x = 33 x = 3
(2x-1) + (2x+1) + (2x+3) = 1172x - 1 + 2x + 1 + 2x + 3 = 1176x + 3 = 1176x = 114x = 19The numbers are 37, 39, and 41.
Your problem is 2x = 39. To figure out what x is, you first have to get rid of the 2 that is attached to the x. To get get rid of it, you have to do the opposite. In this case, that means you have to divide both sides by two. When I put parathesis around it, that means I'm dividing the whole thing by two. (2x = 39) / 2 = 19.5 So that means x=19.5
Their ages: x+5+x = 39 => 2x+5 = 39 => 2x = 39-5 => 2x = 34 => x = 17Therefore: Mary is 17+5 = 22 years and Bob is 17 years
it is 41x because you add the two numbers together and then add x