Answer:
x = 20°
Step-by-step explanation:
The angle measures should add up to 180 degrees. So that leaves us with 100 degrees left to find if we take out the 80 given.
3x + 2x simplifies to 5x. 5x must equal 100.
100/5 = 20.
Therefore x = 20.
3000 + 250x = his monthly pay
x=how many cars he sells
0.23
x = 7
isolate x by dividing both sides by - 2
x = = 7
10 liters of 40% solution
10 liters of 10% solution