Question

(a + 2b)x + (2a - b)y = 2 and (a - 2b)x + (2a + b)y = 3
Solve by Elimination method​

Answer 1

Step-by-step explanation:

(a + 2b)x + (2a - b)y = 2

ax + 2bx + 2ay - by = 2 (1)

(a - 2b)x + (2a + b)y = 3

ax - 2bx + 2ay + by = 3. (2)

eq(1) - (2)

ax - ax + 2bx - -(2bx) + 2ay - 2ay - by - by = 2-3

0 + 4bx + 0 - 2by = -1

4bx - 2by = -1 or

2by - 4bx = 1

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