Ask Question
27 December, 01:12

7 (90-x) - 3 (180-x) = 30

+1
Answers (1)
  1. 27 December, 01:24
    0
    180-x=3 (90-x) + 30

    We move all terms to the left:

    180-x - (3 (90-x) + 30) = 0

    We add all the numbers together, and all the variables

    -x - (3 (-1x+90) + 30) + 180=0

    We add all the numbers together, and all the variables

    -1x - (3 (-1x+90) + 30) + 180=0

    We calculate terms in parentheses: - (3 (-1x+90) + 30), so:

    3 (-1x+90) + 30

    We multiply parentheses

    -3x+270+30

    We add all the numbers together, and all the variables

    -3x+300

    Back to the equation:

    - (-3x+300)

    We get rid of parentheses

    -1x+3x-300+180=0

    We add all the numbers together, and all the variables

    2x-120=0

    We move all terms containing x to the left, all other terms to the right

    2x=120

    x=120/2

    x=60

    So sorry if it's wrong I tried
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “7 (90-x) - 3 (180-x) = 30 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers