Question

4x - y = 11 and 3x -2y = 7
by substitution method​

Answer 1

Answer:

Step-by-step explanation:

4x - y = 11 and 3x -2y = 7

4x-y=11

4x=11+y

x=11+y/4 (1)

3x -2y = 7 (2)

by substituting the value of x=11+y/4 in 2 equation

3(11+y/4)-2y=7

33+3y/4-2y=7

33+3y-8y/4=7

33-5y=28

-5y=28-33

-5y=-5

5y=5

y=5/5

y=1     (3)

putting y=1 in (2)

3x-2(1)=7

3x-2=7

3x=7+2

3x=9

x=9/3

x=3

hence x=3, y=1