For question one.
Substitute numbers for variable
7=m*5+10
fip equation
5m +10=7
now solve for m
subtract 10 from both sides
5m=-3
divide both sides by 5
you end up with a fraction
Answer -3/5
Question 2
perimeter of a rectangle is p=2L+2W
L=length W=width
They are telling you that L=12 and W=5
substitute numbers for variables
p=2*12+2*5
Answer 35
So you need to isolate the variable in order to get your answer. This is how you do it.
3x + 5 = 2x - 7
Subtract 2x from both sides.
1x + 5 = -7
Subtract 5 from both sides to have the variable by itself.
1x = -12
Divide 1 to both sides to find the value of x.
x = -12
Now we need to check.
3(-12) + 5 = 2(-12) - 7
-36 + 5 = -24 - 7
-31 = -31
Since both sides or the same you now know that -12 is the solution.
I hope this helps love! :)
Answer:
8 inches
Step-by-step explanation:
hope this helps :)
Answer:
if the x after the 20 means multiply then the answer is -34/7 or -4 6/7 if the x is a letter then it's 2/11
Step-by-step explanation:
20x2-7x=6
20x2=40
40-7x=6
subtract 40 from 6= 34
-7x=34
34÷-7= -34/7 if needed in a mixed fraction -4 6/7