Answer:
x = 9
Step-by-step explanation:
2 sides are 4 less than x, that is x - 4
The perimeter is the sum of all 3 sides, thus
x + x - 4 + x - 4 = 19, that is
3x - 8 = 19 ( add 8 to both sides )
3x = 27 ( divide both sides by 3 )
x = 9
Answer
x=15, y=48
Step-by-step explanation:
let two nos are x and y
y-3=3x
3x-y=-3...........(1)
also, x+y=63.............(2)
from (1), y=3x+3
y=3x+3 put in equ (2)
x+3x+3=63
4x=63-3=60
x=15=smaller no
y=45+3=48
larger no y=48
x=15, y=48 answer
Answer: 80
Step-by-step explanation:
Triangles equal 180 degree angle. 20 minus 180 is 160. 160 divides by 2 is 80. There are three sides to a triangle.
You can solve all together or separate.
so you do
8<4-x. subtract
-4 -4
4<-x divide
-1. -1
4>x
-4>x since you divide by negative the sign flips.
4-x<10
-4. -4
-x<6
-1 -1
x>-6
8<4-x<10
-4 -4. -4 subtract 4 on all 3
4<-x<6 divide -1 to all 3
-4>x>-6 you flip sign since you divide by negative.
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