Answer: x = 27
Step-by-step explanation:
x/3 - 11 = -2
Add 11 to each side
x/3 = 9
Multiply each side by 3
x = 27
x cannot equal 21.
21/3 - 11
21/3 = 7
7 - 11 = -4
-4 does not equal -2
Therefore, x cannot equal 21.
Answer:
What do you mean?
Step-by-step explanation:
i guess a skill I want to improve is algebra..?
11. 180-73 = 107
10. 180-107=73
12. 180-73=107
13. 5x + 20 + B = 180 -> B = 180 - 20 - 5x and 3x+66 + B = 180 -> 3x+66+ (180 - 20 - 5x) = 180 -> 222-180 = 2x -> x = 21
14. ABC = 5x + 20 = 5*21+20= 125
15. ABE = 3x+66 = 3*21+66 = 129
204 - (-36) = 204 + 36 = 240
Note:
a+(-b) = a-b
a-(+b) = a-b
a+(+b) = a+b
a-(-b) = a+b
Hope that helped :)