What is X?

Algebra Level 1

X * 3 - 1 + 30 = 50

What is X?

8 7 9 6 5

Molly Caldwell by molly caldwell , 19, Canada

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5 solutions

Nihar Mahajan
Feb 11, 2015

3 x − 1 + 30 = 50 \large 3x - 1 + 30 = 50

3 x + 29 = 50 \large 3x + 29 = 50

3 x = 50 − 29 \large 3x = 50 -29

3 x = 21 \large 3x = 21

x = 21 3 \large x =\frac{21}{3}

x = 7 \large\boxed{x =7}

2 Helpful 0 Interesting 0 Brilliant 0 Confused

Easy 100 points, Eh?

Mehul Arora - 6 years, 4 months ago

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Must be 10 points

Nihar Mahajan - 6 years, 4 months ago

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Nah, its a 100 . Should be 10..

Mehul Arora - 6 years, 4 months ago
Mohammad Khaza
Jul 31, 2017

3 x − 1 + 30 = 50 3x-1+30=50

or, x = 7 x=7

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Galen Buhain
Feb 27, 2017

3x - 1 + 30 = 50, 3x = 21, x= 7

0 Helpful 0 Interesting 0 Brilliant 0 Confused
  1. X * 3 - 1 + 30 = 50
  2. X * 3 - 1 = 20
  3. X * 3 = 21
  4. X = 7
  • Subtract 30 from each side
  • Add 1 to each side
  • Divide each side by 3
0 Helpful 0 Interesting 0 Brilliant 0 Confused
Molly Caldwell
Feb 11, 2015

X=7 Because What + 30 =50? 20
Then There Is - 1 So 20 =21 And If You Figure That Out, What Times 3 = 21 7
And That Is The Answer.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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