9x+3x=180 by def. of supplementary
12x=180
12/12x=180/12
x=15
9x=9(15)=135°
<u>Comment</u>
If I don't know what was before the comma in M(, –1) I can't solve this
(I hope I can get brainliest! :))
The total price equals how much food he buys and the price per kilogram
<span>t = pk which is price per kilogram and number of kilo of food multiplied.
</span>
I hope I could help
L, A, B = the amount of money each person has.
L + A + B = 70
B = 3L
L = A +5 or A = L-5
Set up an equation in L only:
L + L - 5 +3L =70
5L -5 = 70
5L =75
L = 15
follows
B=3*15 =45
A = 15 - 5 = 10
