CPM Homework Help : INT3 Problem 1-59

Find the error in the solution below. Identify the error and solve the equation correctly.

$\left. \begin{array}{l}{ 4.1 x = 9.5 x + 23.7 }\\{ - 4.1 x\text{ } \text{ }- 4.1 x }\\ \hline 5.4 x = 23.7 \\{ 5.4 x = 23.7 }\\{ \frac { 5.4 x } { 5.4 } = \frac { 23.7 } { 5.4 } }\\{ x = 4.39 }\end{array} \right.$

Hint:

In the first step, $4.1x$ was subtracted from both sides of the equation. The solver says that $4.1x - 4.1x = 5.4x$ ; what does it really equal? What is really left on the right side of the equation? Solve the equation from there.

More Help:

$0 = 5.4x + 23.7$

Answer:

$x ≈ -4.39$