Question

question 2 of 5
select the correct answer.
what is the solution for r in the equation?
0.4r - 0.13 - 0.7r = 3r - 5.74
r = -1.7
r = 2.1
r = -2.1
r = 1.7
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Explanation:

Step1: Combine like terms on left

$0.4r - 0.7r - 0.13 = 3r - 5.74$
$-0.3r - 0.13 = 3r - 5.74$

Step2: Move r terms to left

$-0.3r - 3r - 0.13 = -5.74$
$-3.3r - 0.13 = -5.74$

Step3: Move constants to right

$-3.3r = -5.74 + 0.13$
$-3.3r = -5.61$

Step4: Solve for r

$r = \frac{-5.61}{-3.3}$
$r = 1.7$

Answer:

$r = 1.7$ (corresponding to the option: $r = 1.7$)