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answer with understandable solution . . 3 - x = 5 and 4x + 1 = 2x - 7 please answer ASAP

Sagot :

Solve for x:
1)  3 - x = 5
     -x = 5-3
     -x = 2
   -1(-x = 2) -1    
      x = -2

To check, x = -2
   3 - x = 5
   3 - (-2) = 5
   3 + 2 = 5
         5 = 5

2)  4x + 1 = 2x-7
     4x-2x = -7-1
     2x = -8
     2x/2 = -8/2
     x = -4

To check, x = -4
  4(-4) + 1 = 2(-4) -7
  -16 + 1 = -8 - 7
       -15 = -15
AwesomeHelperidn
x = ?

+3 - x = 5 
-3         -3      Subtract 3 from both sides.
-x = 2
-1   -1          Divide both sides by negative 1.
x = -2

x = ?

+4x + 1 = 2x - 7
- 2x         -2x          Subtract 2x from both sides
+2x + 1 = -7
       - 1     -1          Subtract 1 from both sides
2x = -8
2       2                  Divide both sides by 2
x = -4