joelmiller101704 joelmiller101704

12-02-2021
Mathematics

contestada

B is between A and C. AB = 3x, BC = 2x + 7, AC = 42

a) X =
b)AB =
c)BC=

Respuesta :

tismian tismian

12-02-2021

Answer: x=7

ab=21

bc=14

Step-by-step explanation:

ab=3x

bc=2x±7

ac=42

3x±2x±7=42

5x±7=42

5x=42-7

5x=35

to get the value of x you divide 35 by 5x

35÷5x=7

so the value of x is 7

ab=3x

x=7

3x=7×3x

7×3=21

x=7

2x=7×2x

2×7=14

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