Pls help i don't under stand

for level 1: x=36

because you just need to do 180-144

for level 2: x = 127

you can just so 180-15-38

for level 3: x = 36

because you start by setting an equation like this:

92 + (2x+16) = 180

subtract 92 from both sides, then subtract 16 from both sides, and finally divide both sides by 2 to get 36

step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9