Home > MC2 > Chapter 6 > Lesson 6.2.7 > Problem6-138

6-138.

For each equation below, solve for $x$. Sometimes the easiest strategy is to use mental math.

1. $x - \frac { 2 } { 3 } = \frac { 1 } { 3 }$

Isolate the $x$ variable.

$x-\frac{2}{3}=\frac{1}{3}$
$+\frac{2}{3} \ \ \ +\frac{2}{3}$

$x = 1$

1. $4 x = 6$

What number do you need to divide both sides by to isolate the $x$ variable?

What is $6$ divided by $4$?

1. $x + 4.6 = 12.96$

Subtract $4.6$ from both sides to isolate $x$.

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

Notice that both sides are divided by $7$.

$x = 3$