Question

Solve each of the following pairs of equations by the elimination method.
3. 3x + 4y = 25
5x-6y = -9​

Answer 1

Step-by-step explanation:

3x + 4y = 25 ------ eq 1

5x-6y = -9 ------ eq 2

Multiplying eq 1 with 3 and eq 2 with 2.

3x + 4y = 25 × 3

5x-6y = -9 × 2

9x + 12y = 75 ---- eq 3

10x - 12y = - 18 ----- eq 4

Adding eq 3 and 4

19x = 57

x = 3