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

2
by JSNacua

• Brainly User
2015-09-21T12:33:40+08:00

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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
2015-09-21T15:04:15+08:00
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