Question

X=3y-4 2x-y=7 use substitution method. pls explain :)

Answer 1

Answer:

the sustitucion metod is easy x=5  y=3

Step-by-step explanation:

x-3y=-4 (-2)

2x-y=7 (1)

-2x+6y=8

2x-y=7

5y=15

y=3

2x-3=7

2x=10

x=5

Answer 2

Step-by-step explanation:

x=3y-4 eqn i

2x-y =7 eqn ii

$2x - 7 = y$

sub y=2x-7 in eqn i

x=3(2x-7)-4

x=6x-21 -4collecting like terms

x-6x= -21-4

-5x= -25

divide both sides by 5

x=5

since x=5 sub in any eqn

y=2x-7

=2(5) -7

y=10 -7=3