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प्रश्न
Complete the following activity to solve the simultaneous equations.
5x + 3y = 9 -----(I)
2x − 3y = 12 ----- (II)
योग
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उत्तर
5x + 3y = 9 -----(I)
2x − 3y = 12 ----- (II)
Adding equations (I) and (II)
5x + 3y = 9
2x − 3y = 12_
7x = 21
x = `21/7`
x = 3
Putting the value of x = 3 in (I) we get
5x + 3y = 9
5(3) + 3y = 9
15 + 3y = 9
3y = 9 − 15
3y = −6
y = `(-6)/3`
y = −2
Thus, (x, y) = (3, −2)
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