Answer:
x = 4
31x + 6 = 130
12x + 2 = 50
Step-by-step explanation:
two angles side by side are equal to 180.
(31x + 6) + (12x + 2) = 180
43x + 8 = 180
43x = 172
x = 4
31x + 6 = 124 + 4 = 130
12x + 2 = 48 + 2 = 50
Answer:
Step-by-step explanation
- Let x be the number of adults and y the number of kids
We can then write this two equations :
x+y= 33
15x+7y= 311
- let's solve the two eaquations
to do that we should combine them both in a way that help us get rid of one of the variables.
Let's multiply the first equation by -7 to get rid of y by adding it to thr second equation
-7x-7y= -231
now add both equations .
15x+7y-7x-7y=311-231
we get : 8x = 80
as you notice y is gone and we get a classic easy equation to solve
x= 80/8
= 10
so the number of adults is 10
let's go back to the first equation ( x+y= 33) and replace x with 10
10+y= 33
y= 33-10
=23
let's check using the second equation :
(10*15)+(23*7) = 311
that is true
so :
- the number of adults is 10
- the number of kids is 23
Answer:
x=7
Step-by-step explanation:
I believe we are solving for x. In that case, let us start by moving 1 to the other side.
Now, we want to get rid of that denominator of 5. Let us multiply both sides by 5:
Now, we may divide both sides by 4 to get rid of the coefficiant:
When we subtract both sides by 3, we get
x=7
<em>I hope this helps! :)</em>
PEMDAS states that the value in the parenthesis should be evaluated first:
4(5*6)
4(30)
After just multiply the value in the parenthesis by the number outside of the parenthesis:
120
