যদি y=5x+4 এবং 5x+8 =40 হয় তবে y=?
A ২৮
B ৩৬
C ৪২
D কোনটিই নয়
Correct Answer: Option B
5x+8 = 40⇒ 5x = 32∴ x = 32/5y = 5 X 32/5 + 4 ∴ y = 36
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