Question

Solve the system of linear equations by substitution
x-y=4
2x-3y=3​

Answer 1

x=9. y = 5. (9,5)

Explanation:

x-y=4. Solve for x or y

+y. +y

x= 4+y

2x-3y=3. Substitute

2(4+y) - 3y=3

8+2y -3y =3

8-y = 3

-8. -8

-y = -5

-1(-y = -5)

y = 5

x - y = 4

x - 5 = 4

+ 5. +5

x=9