Question

the first side of a triangle is 3cm longer than the second side. The third side is 4cm shorter than twice the second side. The perimeter is 31cm. How long is the first side?

Answer 1

x=11

y=8

z=12

Explanation:

x=first side

y=second side

z=third side

1. x=3+y

2. z=2y-4

3.x+y+z=31

input 1 and 2 into 3

(3+y)+y+(2y-4)=31

4y=32

y=8

therefore x=11 and z=12