Question

Directions: Solve the following system of equations using substitution.

Show your complete steps and make sure to have your solution as (x, y).



y = 3x - 5
5x - 4y = -3

Answer 1

y=3x-5...(1)
5x-4y=-3...(2)

By sub. (1) into (2),we have
5x-4(3x-5)=-3
5x-12x+20=-3
-7x=-23
x=3(cor. to l d.p.)

By sub. x=3(cor. to l d.p.) into (1),we have
y=3*3-5
y=4

The solution is (3,4) (cor. to l d.p.)