Answer:16
Step-by-step explanation:
Answer:
x = 25
Step-by-step explanation:
The Exterior Angle Theorem states that the exterior angle of a triangle is equal to the sum of the two opposite interior angles.
This means that
3x - 10 = 25 + (x+15)
3x - 10 = x + 40
Subtract x from both sides of the equation.
2x - 10 = 40
Add 10 to both sides.
2x = 50
Divide both sides by 2.
x = 25
56 as the pattern is add 8
Answer:
x = 9
Step-by-step explanation:
"The sum of 42 and a number x is 51" in "mathy" words:
42 + x = 51
Then, subtract both sides by 42:
42 + x - 42 = 51 - 42
So
x = 9
Answer:
Step-by-step explanation:
{3 x + 4 = y, 3 x = 4 y + 11}
{y = 3 x + 4, y = (3 x)/4 - 11/4}
{2 (3 x - y) = -8, 4 y - 3 x = -11}