Answer:
See below in bold.
Step-by-step explanation:
(A) 20 -4x=12 -x+8-3x
-4x + x + 3x = 12 + 8 - 20
0 = 0 This is an Identity.
Infinite solutions.
B). 5x+4x-3=24+8x
9x - 8x = 24 + 3
x = 27. One solution.
C. 5x+6=2x+6+3x-15
5x - 2x - 3x = -15 + 6 - 6
0 = -15
No solution.
Answer:
y=7
x=5
Step-by-step explanation:
x-y=-2
+y +y
x=-2+y
then substitute -2+y into the x in the other equation
so:
2(-2+y) + 4y = 38
-4+ 2y +4y = 38
-4+6y= 38
+4 +4
6y=42
divide both sides by 6
y=7
to get X:
x-y=-2
x-(7)=-2
+7 +7
x=5
Step-by-step explanation:
First you need to find the semi perimeter (s) and apply the formula of the triangle and you will get your answer
Answer:
W =1 1/4Step-by-step explanation:
Let W = what
W - 1/2 = 3/4
Add 1/2 to each side
W -1/2 +1/2 = 3/4+1/2
W = 3/4+1/2
Getting a common denominator of 4
W =3/4+1/2*2/2
W =3/4 +2/4
W = 5/4
Changing to a mixed number
W = 4/4 +1/4
W = 1 +1/4
W =1 1/4
