Question

Elimination method of solving linear equations7x+4y=29x-4y=30

Answer 1

Answer:

x = 2, y = -3

Explanation:

Given the simultaneous equation

7x+4y=2

9x-4y=30​

Add both equations

7x + 9x = 2 + 30

16x = 32

x = 32/16

x = 2

Substitute x = 2 into equation 1

From 1;

7x + 4y = 2

7(2) + 4y = 2

14 + 4y = 2

4y = 2-14

4y = -12

y = -12/4

y = -3

Hence the solution to the equation is (2, -3)