starting number --- x
Anita's method
2x + x = 3x
Amit:
(x+x)(2) = 4x
4x - 3x = 9
x = 9
My algebra becomes the explanation.
check:
Anita ---> 2(9) + 9 = 27
Amit ---> (9+9)(2) = 36
difference = 36-27 = 9
all is good!
2. Anita multiplies a number by 2 and then adds her starting number to the product. Amit adds this same original number to itself and then multiplies that sum by 2. The difference between Anita’s and Amit’s results is 9. What is their starting number?Explain.
1 answer