Answer:
A+B=B+A
B+0=B
E-C=E+(-C)
Step-by-step explanation:
The 2 angles are complementary angles and need to equal 90 degrees.
Making an equation we have:
4x-10 + x = 90 degrees
Add like tems:
4x +x = 5x
Now we have:
5x-10 = 90
Add 10 to both sides:
5x = 100
Divide both sides by 5:
x = 100/5
X = 20
2x+10=0
subtract 10 from both sides
2x=(-10)
divide 2 from both sides
x=-5
Answer:
10. you're welcome, good Luckk!
