Question

Solve the following system of linear equations by substitution method. y=x+3,3x+y-15=0​

Answer 1

Answer:

33

Step-by-step explanation:

y is the real number in the text book you find that if y is real number the equation is 0x+0y+33=0

Answer 2

Answer:

x=3and y=6 answer

Step-by-step explanation:

y=x+3

x-y=3 (equ 1)

3x+y-15=0

3x+y=15;(eq1)

subtract eq2 - eq1

3x+y=15

x-y=3

_______

4x=12

x=12/4

x=3ans

put x in equation 2

3X3+y=15

9+y=15

y=15-9

y=6ans