Medium Math Class 9 Level 5

In the linear equation 7x + 2y = 31 if x = 3 then what is y?

रेखीय समीकरण 7x + 2y = 31 में यदि x = 3 हो तो y का मान क्या होगा?

A) 3 / 3 B) 4 / 4 C) 5 / 5 D) 6 / 6
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Correct Answer

C. 5 / 5

Explanation

Putting x = 3 gives 21 + 2y = 31 so 2y = 10 and y = 5.

x = 3 रखने पर 21 + 2y = 31 इसलिए 2y = 10 और y = 5।

Related Questions

Easy Math Class 10 Level 1

What is the area of a circle with radius 7 cm when π = 22/7?

7 सेमी त्रिज्या वाले वृत्त का क्षेत्रफल कितना होगा जब π = 22/7 हो?

A. 44 सेमी² / 44 cm² B. 77 सेमी² / 77 cm² C. 154 सेमी² / 154 cm² D. 308 सेमी² / 308 cm²
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