### Home > CCA > Chapter 11 > Lesson 11.3.4 > Problem11-119

11-119.

Solve the equations and inequalities below. Write your solutions in exact form.

1.  $\frac{3}{4}-\frac{x}{3}=\frac{7-x}{4}$

Multiply both sides by $12$ as a Fraction Buster.

1.  $(b−4)^2<12$

Solve the equation $(b−4)^2=12$ to find the boundary points.

Graph the values you found for $b$ on a number line. Then test values from each region to determine which region(s) make(s) the inequality true.

$4-\sqrt{12}

1.  $|3+x|−9\le21$

See the help for part (b).

$−33\le x\le27$

1.  $5n^2−11n+2=0$

$(5n?1)(n?2)=0$