Question

solve the following equation for x. round the answer to the nearest hundredth. -1.4x = 9(x + 2.16)
a. -1.87
b. 0.53
c. -0.21
d. 2.56

Explanation:

Step1: Expand the right - hand side

$-1.4x=9x + 9\times2.16$
$-1.4x=9x + 19.44$

Step2: Move terms with x to one side

$-1.4x-9x=19.44$
$(-1.4 - 9)x=19.44$
$-10.4x=19.44$

Step3: Solve for x

$x=\frac{19.44}{-10.4}\approx - 1.87$

Answer:

A. -1.87