Question

(3) 2x - 3y = 9; 2x + y = 13
II​

Answer 1

Explanation:

2x-3y = 9------(1)

2x+y = 13------(2)

Subtracting eq (2) from (1)

2x-3y = 9

-2x-y = -13

_________

-4y = -4

_________

y = 1

Putting y in eq (1)

2x-3(1) = 9

2x = 12

x = 6

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Answer 2

x = 6 & y = 1

• Step-by-step explanation:

2x - 3y = 9 _(i) 2x + y = 13 _(ii)

• SUBTRACT → (ii) - (i)

2x + y - (2x - 3y) = 13 - 9

2x + y - 2x + 3y = 4

4y = 4

y = 1

• Put y = 4 in eqn. (ii)

2x + 1 = 13

2x = 12

x = 6