Q1 of 70 Page 280

For the equation 5x + 8y = 50, if y = 10, then the value of x is

Given equation, 5x + 8y = 50


Put y = 10 in 5x + 8y = 50


⇒ 5x + 8× 10 = 50


⇒ 5x + 80 = 50


⇒ 5x = 50 – 80


⇒ 5x = – 30



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