Question

: + = 27 = + 3. (15,12). (12,15). (6,21).

Answer 1

(12, 15) (option B)

Step-by-step explanation:

x + y = 27 ..equation 1

y = x + 3 ...equation 2

Using substitution method:

We would substitute for y = x + 3 in equation 1

x + (x + 3) = 27

x + x + 3 = 27

2x + 3 = 27

2x = 27 - 3

2x = 24

x = 24/2

x = 12

Substitute 12 for x in equation 2:

y = 12 + 3

y = 15

The solution to both equations (x, y):

(12, 15) (option B)