Answer:
3 + x = 7
Step-by-step explanation:
-2/3x + 5 = 20 - x
subtract 5 from each side
-2/3 x = 15 -x
add x to each side
-2/3 x +x = 15
get a common denominator of 3 for the x terms
-2/3x + 3/3 x =15
combine like terms
1/3 x = 15
multiply by 3 on each side
x = 45
Answer: x=45
The number her mother is thinking of is 6 or less
Answer:
46 points
Step-by-step explanation:
add 16 + 20+ 10
Answer:
122
Step-by-step explanation:
11x-65+58=180. The 58 comes from adding 29+29=58. You do this because there are two 29 due to it being an isosceles triangle meaning there are two sides equal.
Add your a like terms
11x-7=180
11x=180+7
11x=187
x=17
Plug the 17 in for 11x-65
11*17-65=122
You can change yourself by adding 29+29+122=180. You know this right because all triangles add to 180. '
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