# ABC is a straight line. The length of AB is four times the length of BC. AC = 75 cm. Work out the length of AB.

1 answer

###### Question:

ABC is a straight line.

The length of AB is four times the length of BC.

AC = 75 cm.

Work out the length of AB.

## Answers

Answer:Step-by-step explanation:What is known....AC=75 AB=4 times BC AB+BC=AC4(BC)+BC=75 Add like numbers4(BC)+BC=5BC5(BC)=75 get the variable(BC) alone by dividing both sides by the number(5)5(BC)/5=75/5 Then simplify....5(BC)/5=(BC) and 75/7=15(BC)=15

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