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dexar [7]
3 years ago
6

What value or values of x satisfy 2|x+5.3|=4.2

Mathematics
2 answers:
Rainbow [258]3 years ago
9 0

we have

2\left|x+5.3\right|=4.2

Step 1

Find the first solution (case positive)

2(x+5.3)=4.2

Eliminate the parenthesis left side

2x+10.6=4.2

Subtract 10.6 both sides

2x=4.2-10.6

2x=-6.4

Divide by 2 both sides

x=-3.2

Step 2

Find the second solution (case negative)

2[-(x+5.3)]=4.2

Eliminate the parenthesis left side

-2x-10.6=4.2

Adds 10.6 both sides

-2x=4.2+10.6

-2x=14.8

Divide by -2 both sides

x=-7.4

therefore

the answer is the option C

x can equal –3.2 or –7.4


exis [7]3 years ago
4 0
We have, /x+5.3/ = 2.1;
Then, x + 5.3 = 2.1 or  x + 5.3 = -2.1;
x = 2.1 - 5.3; x = -3.2;
x = -2.1-5.3; x = -7.4;
The correct answer is c.
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