Twice a number increased my 51 is the same as the opposite of the number. Find the number.

iescabroussexg

iescabroussexg

Answered question

2022-09-01

Twice a number increased my 51 is the same as the opposite of the number. Find the number.

Answer & Explanation

Lena Ibarra

Lena Ibarra

Beginner2022-09-02Added 13 answers

We will add a negative sign to indicate opposite
Let the unknown number= x
so:
2x+51=-x
we can then solve for x:
2x+51+x=-x+x
3x+51-51=0-51
3 x ÷ 3 = 51 ÷ 3
x = 51 3
x=-17
Julius Blankenship

Julius Blankenship

Beginner2022-09-03Added 3 answers

x = the unknown number
2x + 51 = -x
51 = -3x
x = -51/3 = -17
check.
2(-17) + 51 = 17

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