Step-by-step explanation:
2x + y = 21
Solving
2x + y = 21
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1y' to each side of the equation.
2x + y + -1y = 21 + -1y
Combine like terms: y + -1y = 0
2x + 0 = 21 + -1y
2x = 21 + -1y
Divide each side by '2'.
x = 10.5 + -0.5y
Simplifying
x = 10.5 + -0.5y
Angles in a triangle add up to 180
2:3:4...added = 9
2/9 (180) = 360/9 = 40 <=== smallest angle
3/9 (180) = 540/9 = 60
4/9 (180) = 720/9 = 80
Answer:
3/5 X 3 1/2 = 3/5 X 7/2 = 21/10 = 2.1 in²
Step-by-step explanation:
<span>5x+2 = 77
5x = 75
x = 15</span>
The GCF of 180 and 240 is 60
