Question

x+y=15; y=x+3. solve by substitution method​

Answer 1

Answer:

X+6 y+6 z+2 and fantasy and reality and the best of luck in the shape the future the best of luck in the magazine for the best of luck in the magazine for the best of luck to all the best way for me to

Answer 2

Answer:

$x + y = 15..........eq(1) \\ \: \: \: \: \: \: \: \: y = x + 3.....eq(2) \\ substitute \: y = x + 3 \: in \: eq(1) \\ \: x + (x + 3) = 15 \\ \: \: \: \: \: \: \: \: \: \: 2x + 3 = 15 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 2x = 15 - 3 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 2x = 12 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = \frac{12}{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x = 6(substitute \: in \: eq2) \\ \: \: \: \: y = 6 + 3 \\ \: \: \: \: y = 9$

☆Therefore, x=6 and y=9................

HOPE IT HELPS YOU..........