Question

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

Answer 1

Answer:

x = 5

y = (-2)

Step-by-step explanation:

2x+3y=4

2x=4-3y

x=(4-3y)/2 ------------ (1)

x-y=7

(4-3y)/2-y = 7. [From (1)]

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

4-5y = 14

5y = (-10)

y = (-2)

Substituting the value of y in (1) we get

x = [4-3*(-2)]/2

x = (4+6)/2

x = 10/2

x= 5