48 = -18x is an equivalent expression because you just subtact -18 from both sides.
Make the denominators the same
Multiply the first fraction by 4, second fraction by 3 to get the same denominator
Add the numerators, denominators stay the same
Divide by 3 to numerator and denominator to simplify to lowest fraction
Step-by-step explanation:
all angles of a triangle sum to 180
180 = 15x + 24x +21x
180=60x
solve for x
then substitute that for 24(x) to get the angle
Hi there!
Since we know that the sum of all 3 measures of a triangle is always equal to 180 degrees, and that supplementary angles are equal to 180 degrees when added, we can solve by first finding the supplement to ?.
75 + 40 + ? = 180
180 - 75 - 40 = ?
105 - 40 = ?
? = 75
Now, we find the actual? .
Since 75 + ? = 180,
180 - 75 = 115
? = 115
So, your answer is 115°.
Hope this helps!
