Answer:
x = 50
Step-by-step explanation:
Given
(x + 10) + (2x + 20) = 180 ( remove the parenthesis )
x + 10 + 2x + 20 = 180, that is
3x + 30 = 180 ( subtract 30 from both sides )
3x = 150 ( divide both sides by 3 )
x = 50
10+7=17
3 numbers are between 10 and 7
Percentage decrease = (original number - new number) / original number...* 100
percentage decrease = (2.55 -2.20) / 2.55....* 100
0.35 / 2.55.....* 100
0.137 * 100
13.7% decrease <===
Answer:
1
Step-by-step explanation: