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grin007 [14]
2 years ago
15

7x + 5 = 3x - 15solve for x​

Mathematics
2 answers:
jek_recluse [69]2 years ago
6 0

Answer:

7x+5=3x-15 x=-5

Step-by-step explanation:

Subtract from both sides

7x+5-5=3x-15-5

{Simplify}

7x=3x-20

{Subtract}{3x from both sides}

7x-3x=3x-20-3x

{Simplify}

4x=-20

Divide both sides by 4

4x over 4= -20 over 4

 {Simplify}  

  x=-5

Digiron [165]2 years ago
4 0

7x +5 = 3x -15

4x = -20

x = -5

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Type the correct answer in each box. Round numbers to the nearest tenth, if necessary.
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ANSWER

x = 1.6

EXPLANATION

The given equation is:

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Group similar terms to obtain:

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Simplify similar terms,

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Divide both sides by -2.5

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Step-by-step explanation:
we know that
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Let
x -----> the measure of an angle
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we know that
x+y=90 -----> y=90-x -----> equation A
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