Answer:
well
Step-by-step explanation:
3 times 15 is 45
then 3 times negative x is -3x
so 45 - 3x = 2x
3 x moved to the other side turns positive
so you have
5x = 45
45÷5
x = 9
Answer:
Which means that the first number is 192, the second number is 192 + 1 and the third number is 192 + 2. Therefore, three consecutive integers that add up to 579 are 192, 193, and 194. We know our answer is correct because 192 + 193 + 194 equals 579 as displayed above.
Step-by-step explanation:
Answer:
4n = 160°
Step-by-step explanation:
Sum of angles on a straight line is 180°
20 + 3n + n = 180
4n = 180 - 20
4n = 160°
What I do is to add up the hundreds and tens in my mind first:
130 + 90 + 160 = 380
and then add the small change:
7.50 + 2.50 + 2.50 = 12.50
and add it back to the first amount
392.50
