Yes you are correct because if you do 10x3 that gives you thirty and then do 30-3 which is 27 and so since 3x9=27 the way you explained it will also get you to 27 and so thank you for the question.
Answer:
197/35
Step-by-step explanation:
8 3/7-2 4/5
59/7-14/5
295/35-98/35
197/35
D • 5
Unless I misread this.
Answer: Alvin = 42 yrs , Elga = 21 yrs
Step-by-step explanation:
Let Elga's age be x , and Alvin's age be y ,since Alvin is two times Elga's age , then
Alvin's age = 2x , that is
y = 2x ............... equation 1
The sum of their ages is 63 implies
x + y = 63 .............. equation 2
Solving the resulting linear equations by substitution method.
Substitute equation 1 into equation 2 , we have
x + 2x = 63
3x = 63
x = 63/3
x = 21
Therefore : Elga is 21 years old , then Alvin will be 21 x 2, which will be 42
Your answer is C, hope this helps