alleryx + y = 7 اور x - y = 3 کو شامل کرنے سے کون سا متغیر ختم ہو جاتا ہے؟
Aدونوں
Bنہ ہی
Cy
Dx
Answer & Solution
Correct answer: C. y
مساوات کو شامل کرنے پر +y اور -y اصطلاحات منسوخ ہو جاتی ہیں۔
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