If the value of a real number x satisfies -2x + 5= -1, then what is the value of 5x

Mathematics

2 answers:

Nitella [24]3 years ago

8 0

-2x + 5 = -1

subtract 5 from both sides: -2x = -6

divide each side by -2: x = 3

plug in 3: 5(3)

multiply: 15

the value of 5x is 15.

sp2606 [1]3 years ago

5 0

First, solve for x.

-2x + 5 = -1

Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

First, subtract 5 from both sides

-2x + 5 (-5) = -1 (-5)

-2x = -6

Next, divide -2 from both sides

-2x/-2 = -6/-2

x = -6/-2

x = 3

------------------------------------------------------------------------------------------------------------------------

Plug in 3 for x

5x = 5(3) = 5 x 3 = 15

15 is your answer

hope this helps

You might be interested in

A and b are positive integers and a-b=2. Evaluate the following: 9^1/2b/3^a

OlgaM077 [116]

Answer:

$\frac{1}{ 9 }$

Step-by-step explanation:

$\huge \frac{ {9}^{ \frac{1}{2}b } }{ {3}^{a} } \\ \\ = \huge \frac{ {( {3}^{2} )}^{ \frac{1}{2}b } }{ {3}^{a} } \\ \\ = \huge \frac{ { {3}}^{2 \times \frac{1}{2}b } }{ {3}^{a} } \\ \\ \huge = \frac{ {3}^{b} }{ {3}^{a} } \\ \\ \huge = \frac{1}{ {3}^{a - b} } \\ \\ \huge= \frac{1}{ {3}^{2} } \\ ( \because \: a - b = 2)\\ \\ \huge = \frac{1}{ 9 }$