যদি y=5x+4 এবং 5x+8 =40 হয় তবে y=?

A    ২৮

B    ৩৬

C    ৪২

D    কোনটিই নয়

Solution

Correct Answer: Option B

5x+8 = 40
⇒ 5x = 32
∴ x = 32/5
y = 5 X 32/5 + 4
∴ y = 36

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