Answer:
x = 7
Step-by-step explanation:
This is an isosceles triangle
This means two angles are identical
There are 2 angles with the size 9x-25
Now you should add all of the angles together
104 + 9x-25 +9x-25
Then simplify this
54 + 18x
You should know that angles in a triangle add up to 180
54 + 18x = 180
Subtract 54 from both sides
18x = 126
divide both sides by 18
x = 7
Answer: x=-2
Step-by-step explanation:
addition property of equality is adding the same number to both sides of an equation does not change the equation.
distributive property: a(b+c)=ab+ac
add 3 both sides of an equation.
6x-3+3=3x-9+3
simplify an equation
6x=3x-6
subtract 3x both sides of an equation
6x-3x=3x-6-3x
simplify
3x=-6
divide 3 both sides of an equation
3x/3=-6/3
simplify
-6/3=-2
the answer should be the negative sign.
x=-2
Hope this helps!
Thanks!
The numbers by writing and solving a system of equations are 50 and 105
Let the unknown numbers be x and y
If twice a number plus twice a second number is 310, then;
2x + 2y = 310
x + y = 155
x = 155 - y
Also, If the difference of the numbers is 55, hence;
x - y = 55
155 - y - y = 55
155 - 2y = 55
-2y = 55 - 505
2y = 100
y = 50
Substitute y = 25 into 1 to have:
x = 155 - 50
x = 105
Hence the numbers by writing and solving a system of equations are 50 and 105
Learn more on system of equations here: brainly.com/question/847634
Answer:
3.5
Step-by-step explanation:
just took the quiz