Question

Marla is solving the equation shown below. Two of her friends, Peter and

Uma present equations that they claim are equivalent to Marla's. Which
statement is correct about their equations.
=
Marld's equation :
[(x + 5) + x ] + 8 15
Peter's equation : (x + (5 + x)] + 8
+ 8 = 15
Uma's Equation : (x + 5) + (x + 8]
= 15
Only Peter's equation is equivalent to Marla's
Only Uma's equation is equivalent to Marla's
Both Peter and Uma have written equations that are equivalent to Marla's.
Neither Peter nor Uma's equations are equivalent to Marla's.

Answer 1

2(2x +4y) +(3x -y) = 2(10) +(8)

.. 7x +7y = 28

Marla has incorrectly calculated the constant as 12. It should be 28.

Explanation: