Question

The sum of twice a number and three equals five. Find the number

- Can someone help me with this I'm lost

Answer 1

let ' a number ' = x

twice a number = 2x

The sum of 2x and three = 2x + 3

...equals five: 2x + 3 = 5


Find the number
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2x + 3 = 5

Isolate the x. Do the opposite of PEMDAS. Note that because of the equal sign, what you do to one side, you do to the other.

Subtract 3 from both sides
2x + 3 (-3) = 5 (-3)

2x = 5 - 3

2x = 2
divide 2 from both sides
2x/2 = 2/2

x = 2/2

x = 1

x = 1 is your answer


hope this helps

Answer 2

2n + 3 = 5
2n = 2
n = 1
the sum of 2 times a number and three means you add 2n + 3 and since it is equal to 5 you then solve for n.