more math

[Gordon9721]

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the largest of five consecutive even integers is 2 less than twice the smallest. which of the following is the largest integer?

answer is 18

but how?

n= 10 but i just can't get the right answer


also, the angles of a triangle are in the ratio 2:3:5. what is the measure of the smallest angle?
answer is 36 degrees.
how?

 

[Gordon9721]

and another- there are three consecutive even integers such that the third of the three even integers is 10 more than the sum of the first and second. what is the third integer?
the answer is -4
can't get this one either. the integers are 👎 , (n+2) , and (n+4)
and i use the equation (n+4) + 10 = 👎 + (n+2)
n+14 = 2n+2
just can't get the answer. frustrated and freaking out. help please!!

 

[cdmOMR]

also, the angles of a triangle are in the ratio 2:3:5. what is the measure of the smallest angle?
answer is 36 degrees.
how?

2x+3x+5x=180
10x=180
x=18

smallest angle=2x=2(18)= 36