For this case we must solve the following equation:
[tex]2x + 1 = -x + 4[/tex]
We add "x" to both sides of the equation:
[tex]2x + x + 1 = -x + x + 4[/tex]
We add similar terms:
[tex]3x + 1 = 4[/tex]
We subtract "1" on both sides of the equation:
[tex]3x-1 + 1 = 4-1\\3x = 4-1\\3x = 3[/tex]
We divide between 3 on both sides of the equation:
[tex]\frac {3x} {3} = \frac {3} {3}\\x = 1[/tex]
Answer:
[tex]x = 1[/tex]
