25. FIND THE ERROR In the system a + b = 7 and 1.29a + 0.49b = 6.63, a represents pounds of apples and b represents pounds of bananas a person bought. Guillermo and Cara are finding and interpreting the solution. Is either correct? Explain your reasoning. Guillermo 1.29a + 0.49b = 6.63 1.29a +0.49(a + 7) = 6.63 1.29a + 0.49a + 3.43 = 6.63 1.78a = 3.2 a = 1.8 a + b = 7, so b = 5.2. The solution (1.8, 5.2) means that 1.8 pounds of apples and 5.2 pounds of bananas were bought.
Cara 1.29a + 0.49b = 6,63 1.29(7-b) + 0.49b = 6.63 9.03 1.296 + 0.496 = 6.63 -0.8b = -2.4 b=3 The solution b = 3 means that 3 pounds of apples and 3 pounds of bananas were bought. uolunteers. The ratio of boys to girls is 7:5.​