Question

Please help me Using substitution method solve :

Answer 1

Answer:

(1, - 2 )

Step-by-step explanation:

Given the equations

9x + 2y = 5 ( subtract 9x from both sides )

2y = 5 - 9x ( divide terms by 2 )

y = 2.5 - 4.5x → (1)

7x - 3y = 13 → (2)

Substitute y = 2.5 - 4.5x into (2)

7x - 3(2.5 - 4.5x) = 13

7x - 7.5 + 13.5 = 13 , that is

7x + 6 = 13 ( subtract 6 from both sides )

7x = 7 ( divide both sides by 7 )

x = 1

Substitute x = 1 into (1) and evaluate for y

y = 2.5 - 4.5(1) = 2.5 - 4.5 = - 2

solution is (1, - 2 )