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3 years ago

39 А В с 9х+7 - 3x+20

Mathematics

1 answer:

matrenka [14]3 years ago

8 0

Answer:

x=2

Step-by-step explanation:

We are given that the length of the line segment AC is 39. We are also given the length segment of AB = 9x+7 and the line segment BC is equivalent to -3x+20.

We also know based off the diagram that AC = AB + BC. We can use substitution to set up an equation:

AB+BC=AC

9x+7-3x+20=39

Combine like terms

6x+27=39

Subtract 27 from both sides

6x=12

Divide both sides by 6 to isolate x

x=2

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