Question

If 7x+Sy=12=5x+7y, then y+ xy² is equal to:

Answer 1

Answer:

Step-by-step explanation:

In this case you don't have to solve the equation, just go over the options provided.

The options (b), (c), (d) have all fractions with (numerator = denominator) ⇒ fractions equal to 1. The option (a) provide the values for "x" and "y" as (- 1, 1).

Thus, the option (a) - 22/22, 14/14  is the answer for this task.

Answer 2

Given,

7x+5y=12 (eq.1)*5

5x+7y=12  (eq.2)*7

subtracting eq. 2 from eq. 1 we get,

y=1

substituting value in eq. 1 we get,

7x+5=12

x=1

y+xy²= 1+(1*1²)

=2