Rennyidn
Answered

IDNStudy.com, ang iyong pangunahing mapagkukunan para sa mga sagot ng eksperto. Ang aming mga eksperto ay handang magbigay ng malalim na sagot at praktikal na solusyon sa lahat ng iyong mga tanong.

What is "x"

1.3x+4-8÷2×5-3+1=3
2.2x+6-12×3÷2+3×-20+5=6


Sagot :

Woah! This might take a long time but let us answer this by simplifying it first using the combination of terms. We should use the PMDAS and the left-to-right method if it is already pure Subtraction and Addition or pure Multiplication and Division.
Okay, number 1:

1.) 3x + 4 - 8 / 2 x 5 - 3 + 1 = 3
  3x  + 4 - [(8/2) x 5] - 3 + 1 = 3 
3x + 4 - [ (4) x 5 ] - 3 + 1 = 3
3x + 4 - 20 - 3 + 1 = 3
3x -16 - 3 + 1 = 3
3x - 19 + 1 = 3
3x -18 = 3
3x = 3 + 18
3x = 21
x = 7
Check: 
3x + 4 - [ (8/2) x 5 ] - 3 + 1 = 3
3(7) + 4 - [(8/2) x 5] - 3 + 1 = 3
21 + 4 - [ 4 x 5 ] - 3 + 1 = 3
21 + 4 - 20 - 3 + 1 = 3
25 - 20 -3 + 1 = 3
5 - 3 + 1 = 3
2 + 1 = 3
3 = 3, CORRECT!!!

Number 2.

2.) 2x + 6 - 12 x 3 / 2 + 3x - 20 + 5 = 6
  2x + 6 - [(12 x 3) / 2] + 3x - 20 + 5 = 6
2x + 6 - [ 36 / 2 ] + 3x - 20 + 5 = 6 
2x + 6 - 18 + 3x - 20 + 5 = 6
2x - 12 + 3x - 20 + 5 = 6
5x - 12 - 20 + 5 = 6
5x - 32 + 5 = 6
5x - 27 = 6
5x = 6 + 27
5x = 33
x = 33/ 5

Check:
    2x + 6 - [(12 x 3) / 2] + 3x - 20 + 5 = 6
   2x + 6 - [ 36 / 2 ] + 3x - 20 + 5 = 6
   2x + 6 - 18 + 3x - 20 + 5 = 6
  2(33/5) + 6 - 18 + 3(33/5) - 20 + 5 = 6
  66 / 5 - 12 + 99/5 - 20 + 5 = 6
 165 / 5 - 32 + 5 = 6
  165 / 5 - 27 = 6
165 / 5 = 6 + 27
165 / 5 = 33
33 = 33, CORRECT!!!

So the answers are:
1.) 7
2.) 33/5

(Note: You can be sure that these are correct if my answers are not wrong. Please correct me if I have a mistake, :) : ) :) )