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IrinaK [193]
2 years ago
12

5(x + 7) = 15 what is the value of x

Mathematics
2 answers:
Sindrei [870]2 years ago
6 0

Step-by-step explanation:

5(x + 7) = 15

x+7=3

x=-4!!!!!!

sukhopar [10]2 years ago
4 0

Answer:

x = -4

Step-by-step explanation:

<u>Solve for x</u>

  • 5 ( x + 7 ) = 15

Divide each side by 5

  • 5( x + 7 ) ÷ 5 = 15 ÷ 5
  • x + 7 = 3

subtract 7 from both side

  • x + 7- 7 = 3 - 7
  • x = -4
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Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

Let's first establish that triangle BCD is a right-angle triangle.

Therefore, we can use Pythagoras theorem to find BC and solve this problem. Pythagoras theorem is displayed below:

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a = square root of ( 100 )

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If we want to check our answer, we can substitute the value of ( a ) from our answer in conjunction with the values given in the problem into the Pythagoras theorem. If the left-hand side is equivalent to the right-hand side, then the answer must be correct as displayed below:

a = BC = 10

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FINAL ANSWER:

Therefore, BC is equivalent to 10.

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